If you have nothing else on hand when you get started, then turpentine may be the best bet. FREE Delivery. What is the best brush for applying polyurethane? The best way to start this is to take out a clean stirring stick. Acetone is a powerful solvent for both oil-based and latex-based paint, and can be used to remove uncured paint from a wide variety of surfaces. Members; 9,028 3,112 posts; Share; Posted August 5, 2017. Signs of Mismatched Solvents Some symptoms that the solvent used was incorrectly matched to the paint include poor gloss and adhesion, dullness, chalking, cracks or splits, blisters, sanding swell, blushing or … Some people assume that thinning polyurethane with naphtha or other solvents will create a faster-drying product. You should always check the label on the paint thinner to make sure it works well with polyurethane products before you start. Related: A Complete Guide To Painting Your Own House Like A Professional. Strain Out Impurities . Universal Paint Thinner & Solvents T0200 (T1000) Xylene Based Will Thin Most Paint Coatings Including Quick Drying, Two Pack Epoxy, Chlorinated Rubber,Etch Primers Etc (2.5 Litre) 5.0 out of 5 stars 9. BlackRat 9,028 Posted August 5, 2017. Continue to mix in some more thinner as well. THINNER FOR POLYURETHANE PAINTS Safety Data Sheet dated 9/6/2009, version 3 1. Yes, paint thinners can be used to help thin out polyurethane if it becomes too thick. Thanks . A little at a time is plenty here. Yes, paint thinners can be used to help thin out polyurethane if it becomes too thick. The paint utilizes a three-part system: paint, thinner, and a polyurethane additive. It is suitable for thinning TOA Polyurethane 2K Paint film becomes easy to apply, smooth and highly adhesive. How do you thin a water based paint for a spray gun? While looking on the label of the mineral spirits, you will notice they are distilled from petroleum and work as not only a thinning medium, but a milk solvent. These include: Water works well if you already use a water-based polyurethane. Can you use mineral spirits to thin polyurethane? Thinning Polyurethane for Spraying ... You can use mineral spirits, naptha, lacquer thinner... assuming that you have an oil base poly (not a waterborne). The ratio isn’t crucial. Oil-based paints frequently require "thinning" to reduce their viscosity, or thickness, to improve flow and shorten drying time. I'm in a similar position, only far from a paint store where I can buy polyurethane paint thinner at any price. This site is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. you'll want to use mineral spirits (paint thinner) or naphtha when dealing with an oil based poly. It is a versatile paint that covers well, lasts a long time, and looks amazing. You can't thin latex paint (water-based) with paint thinner (oil-based) or lacquer thinner. (Complete Guide). 99. What happens if you don't sand between coats of polyurethane? Polyurethane will repel the acetone, and it will bead up like water. Measure urethane paint thinner based on your ideal thinning ratio. However, since most paint thinners are made out of many different types of substances depending on the brand you buy, they may also have different levels of toxicity and odor. Quoted Text Here . A little bit at a time is plenty to help start and you can always add in more later. The Clever Homeowner is reader-supported. Just to make things complicated, acetone is miscible with all of them. If the polyurethane is not water-based, then you do not want to add water to it. It. As long as the paint thinner is approved to be used in the polyurethane, you will be fine. BlackRat. Easy to brush. However, if you do not have paint thinner on hand, there are a few other options you can use to help thin out the polyurethane and get it to the right consistency that you want. naphtha will slow your drying time a bit more, which will help with flow out and leveling. But don’t worry, we’ll go through a couple of methods that will teach you how to clean polyurethane off brush, so no need to throw them away. Why is my Molly sitting at the bottom of the tank? This is not entirely the case. But it doesn’t affect the durability, flexibility or toughness of products it’s added to. To thin your enamel paint, you will need to use the correct thinner, and ensure that you consult the manufacturer’s guidelines before beginning to thin the paint. Paint thinner can be used to help thin polyurethane to the right consistency that you need. How do you smooth the final coat of polyurethane? It’s applied much like oil, but because it dries hard, the excess … White spirit for thinning paint. Reply to Geroge Barns. 17. Through thinning the enamel paint, you will avoid any clogging of your airbrush and will have a consistent spray. Apply the polyurethane finish lightly to the brush, making sure to wipe off any extra. It is important that the solvent you use to thin the epoxy will evaporate completely and fast, so that it does not remain in the epoxy when it dries, potentially weakening the bond further. Asked By: Lesia Bublitz | Last Updated: 12th April, 2020, Mineral spirits or acetone are acceptable, It's also an industrial chemical used in lacquers, stains and as a thinning agent. However, since most paint thinners are made out of many different types of substances depending on the brand you buy, they may also have different levels of toxicity and odor. What is the ending of a tale of two cities? Paint Primer Paint & Primer Stain Enamel Acrylic Alkyd Paint Sealer Polyurethane Chalk Paint Waterproofer for masonry/stucco/brick Lacquer (water-based only) Primer Polyurethane Shellac Lacquer Sealer *Lacquer Thinner, Xylene, Toluene, Acetone, MEK (Methyl Ethyl Ketone) Denatured Alcohol, Turpentine, and Naphtha and any other solvent- Polyurethane out of the can is extremely thick and hard to apply without incidents of bubbling, puddling or running. posted 16 years ago. How to Use Nail Polish Remover as a Paint Thinner. Does Hermione die in Harry Potter and the cursed child? I haven't bothered using AK's thinner. Do you sand the last coat of polyurethane? You can add in it, though do so in stages so the paint will not get too thin. There are not instruction of thinning, but cleaning with either minerals spirit or paint thinner. Is acetone stronger than lacquer thinner? If your project is going to get heavy use, just put more coats on. They are hyping their product. Contact options for registered users. Brush the sanded area off with a soft cloth to remove all traces of dirt and grit from the sanding. Application: This product is designed for spray application. Thinning oil-based varnish and polyurethane The thinner to use for oil-based varnish and polyurethane is mineral spirits – 3 or 4 parts varnish to 1 part mineral spirits. Just make sure to read the label first. Manufacturers like to advertise ONE COAT RESULTS. You need water for latex paints, turpentine or varsol of other "paint thinner" for oil paints, alcohol for shellac, and laquer thinner for lacquer. And as an Amazon Associate, we earn a commission on qualifying purchases after clicking on those links, at no additional cost to you. With its special blend of solvents, Thinner No.10 thins and cleans two-part polyurethane products. To seal the wood before top coating, thin your oil-based polyurethane to one part mineral spirits and two parts polyurethane (first, gently stir the contents in the can). Reply; patrick206. Mixed with Polyurethane Matt, surface turns out extra matt and smooth without … What cars have the most expensive catalytic converters? Several substances can be used to thin polyurethane including turpentine, mineral spirits, paint thinner or, in some cases, water. TOA Polyurethane Thinner 2K No.43N is formulated from mixed organic solvents. There are many stores that sell International products throughout Australia. You can also choose mineral spirits to help thin out your polyurethane. £18.99 £ 18. Does acetone remove polyurethane? Acetone is a solvent that dissolves uncured polyurethane foam and can be used to clean up foam before it cures. Topic tags/keywords: resource. Continue this until the polyurethane has a texture that is uniform. Pour equal parts of lacquer thinner and denatured alcohol into a small empty paint can. When you buy through links on our site, we may earn an affiliate commission at no additional cost to you. Some nail polish remover is composed entirely of acetone, and can be safely used to thin paint. If thinning is necessary, thin with up to 1 pint MOTHANETM Thinner 43-EF-70 or MOTHANETM Retarder 43-EF-80 per gallon. I haven't bothered using AK's thinner. If you put too much of the thinning agent in at a time, it can make the polyurethane too watery and it won’t work as well as you want. The instruction printed on the can "Do Not Shake" in bold letter, "Stir slowly....." why? Forum topic by Jeff Murdock: posted 10-22-2011 03:26 AM: 14557 views: 1 time favorited: 4 replies: Jeff Murdock. Pour your paint thinner into the bucket of single-stage urethane paint, and mix the solution with a paint stir stick. If the composition of a paint is oil based, then I think it's OK to use turps or kerosene, but with the polyurethane paints I'm not at all convinced that either would do the job. How do you apply polyurethane without brush marks? A - v. S. Pertini, 52 62012 Civitanova Marche (MC) ITALY Emergency telephone number of the … Turps for cleaning brushes. While there are many different types of thinning agents you can use with polyurethane, you need to use the right thinning technique to make sure your paint will not spoil or run into trouble. Fri, Oct 29, 2004 4:49 AM. PRODUCT AND COMPANY IDENTIFICATION Trade name: THINNER FOR POLYURETHANE PAINTS Trade code: D1010U Product type and use: Thinner Company: INDUSTRIA CHIMICA ADRIATICA S.p.a. Z. Ind. Living in San Antonio, TX during the summer I also add a drop or two of their flow improver. If the polyurethane glue has not yet had a chance to dry, proceed to scrub the stained area with mild soap and warm water. Brush the sealer on with a natural-bristle brush using long, even strokes. It’s not thinned to make it bond better to the wood, but to make it easy to wipe on and wipe off. Lacquer will dissolve and varnishes and shellacs will turn sticky after a few minutes. Only 5 left in stock. The primary advantage of wipe-on and spray polyurethanes is thinness. Brush the sealer on with a natural-bristle brush using long, even strokes. They can easily help thin out your polyurethane and get it to the consistency that you want. When thinning water based paints such as latex, you should be adding 1/2 cup water to your paint and then thoroughly stirring. Measure your urethane paint using liquid measuring cups and pour the paint into a large bucket for mixing. What does the butterfly symbolize in Japan? However, this isn’t necessarily true . Thin your oil-based polyurethane with mineral spirits. Cellulose thinners for a thorough cleaning of brushes every now and again (removes the build up at the ferrule). Always add the thinner in as carefully as possible. 3 posts in 3426 days. Re-assembly. 10-22-2011 03:26 AM . Find a stockist that's near you. 1 Link to post Share on other sites. When the paint is thinned for airbrushing it will probably appear thicker than what you're used to. However, there may be some materials or some areas of the home that do not need the regular thickness that come from polyurethane. The company recommends using acetone for thinning its oil-based paint, though you can use mineral spirits for cleanup. The paints' high pigment content accounts for the thickness. Let’s take a look at polyurethane and how paint thinners are able to help give you the exact consistency and texture that you want with this type of paint. Like all varnishes, oil-based polyurethane dries in two steps. Naphtha dries (evaporates) much faster than mineral spirits (paint thinner). Stir the mixture around with a clean stick and then determine if you need to add more paint thinner or not. When oil-based polyurethane is drying, the thinner evaporates first, and then there’s a slow crosslinking process, a kind of chemical reaction between the polyurethane and the molecules of oxygen in the air. Rub a little acetone, found in nail polish remover, over an inconspicuous spot in a small, circular motion. Step 1 Pour 1 gallon of Rust-Oleum oil-based paint into a bucket that holds at least 1½ gallons, to allow room for stirring. What's the difference between acetone and nail polish remover? How Soon Can You Put Painters Tape on Fresh Paint? … Step 2 – Soak the Clothing in Paint Thinner. THINNING POLYURETHANE. Can I use acetone in place of mineral spirits? It has a really strong smell and this can be off putting to many who want to use it. If primer requires thinning prior to application, the paint can be mixed with a commercially prepared paint thinner made up of petroleum distillates. Hey Greg, No, it's not Model Air that's the issue, it's their other line, Model Color, that I am trying to figure out the thinning ratios. Member since March 2013 ; Posted by patrick206 on Tuesday, April 25, 2017 7:31 PM KansasSteve. How do I see my subscribed workshop items? Wipe Off Excess Paint . General Purpose Thinner are widely used for thinning lacquer paints / automotive paints and wood polishers. Mineral spirits are the slowest drying and lacquer is the fastest of these three. Can You Pour Concrete In The Rain For Fence Posts? One thing to keep in mind with this though is to only add the turpentine into the polyurethane if you can do so outside or in a well-ventilated area. Sand down the brush marks lightly with the fine-grit sandpaper. We may earn a commission on qualifying purchases after clicking on those links, at no additional cost to you. How much should I cut it and with what? Always read the label to make sure the paint thinner is compatible with polyurethane before beginning. The thicker the product is applied the more likely it will be flawed. Some of the links on our website are affiliate links. The second, and much longer step, is by the crosslinking brought about by the introduction of oxygen from the air. What can I use to thin urethane paint? Brush application is considered for touch up of small areas. How long does it take for paint thinner to evaporate? Click to see full answer Consequently, what do you use to thin polyurethane? To get the paint thinner ready to go, you simply need to open up the can of polyurethane and pour a little bit in. Promotion Available. The poly flattens out so no brush streaks. Third, the product that I call “wiping varnish” that is often labeled tung oil, Seal-a-Cell, Salad Bowl Finish, Pro Fin, Val-Oil or some other unhelpful name, is typically varnish or polyurethane thinned about half with mineral spirits (paint thinner). Thinner (See Photo #2) Mission Models has their own proprietary thinner solution that is used with their paints and primers. Wipe-on poly is applied with a clean, lint-free rag. 2 drops of paint to one drop of thinner. Thin your oil-based polyurethane with mineral spirits. At the same time, use the clean stick to slowly mix the thinner with the polyurethane. To seal the wood before top coating, thin your oil-based polyurethane to one part mineral spirits and two parts polyurethane (first, gently stir the contents in the can). They need something a little thinner, but can you use paint thinner to help with this? If you have some paint thinner on hand and want to make your polyurethane thinner, then go ahead and use that. the solvents in it don't do poly a whole lot of favors. Subsequently, question is, what does acetone do to polyurethane? Paint in need of thinning will clog the exit hole and either will not drain at all or will take an unreasonably long time to drain. Spray poly goes on just like spray paint. £6.17 £ 6. Drying between coats has never been a problem. Thinning: Material is supplied at airless spray viscosity and should not require thinning. Homogeneously mixed with Polyurethane 2K. As you go, scrape any thick material from the sides and bottom of the can. The paint will tell you explicitly whether a thinner or a reducer should be used to thin the paint. Notify me about replies to my post Post Reply G. Geroge Barns. Both can be applied in ultra-thin coats that result in less buildup in nooks and crannies, provided you don't apply too much. Keeping this in view, can acetone be used as a paint thinner? A figure eight motion is the best way to do the stirring to get everything mixed in well. These are advantageous to work with because they do not have a strong odor with them and this makes them easy to use and pleasant. If you prefer to apply these finishes with a rag, thin them with about 50% mineral spirits, essentially creating your own ‘wiping varnish’. Last coat 75/25 satin poly and paint thinner. I have had excellent results with Mr. Color Leveling Thinner, Tamiya yellow cap, and plain old iso alcohol. Any type that you get from the paint or hardware store will be fine here. It has been suggested to thin or cut Minwax polyurethane so it will go on easier. thinning polyurethane « back to Finishing forum. Step 2 Measure 6½ ounces of acetone in a measuring cup, pour it into the paint and mix it thoroughly with a wooden stirring stick. Apply the polyurethane finish lightly to the brush, making sure to wipe off any extra. It is a simple solution that breaks or dissolves down the thick properties of varnishes and paints, lacquer, oils, grease and other strong adhesive material. Using polyurethane paint can be a great option for many areas of your home. Paint thinner is very effective at its job and putting too much in too quickly can leave you with a watery paint that is hard to use. Don't add more than you absolutely need to get the right consistency, so the … Roll it up in a tube shape about 3 inches wide. Rustins CELT125 125ml Cellulose Thinners. Doing so slowly helps you get the perfect texture each time. Naptha and mineral spirits are safer choices, but I often use lacquer thinner and even combinations of any of these products. Instead, slowly add in the thinner of your choice, doing so in several batches. You should always check the label on the paint thinner to make sure it works well with polyurethane … lacquer thinner, when working with a polyurethane, is generally only used for cleaning spray guns. The rule of thumb when thinning is that a little goes a long way. Look on the can and follow the instructions exactly before you use this method. Can Paint Thinner Thin Polyurethane? This leads many to believe that thinning polyurethane with naphtha will make it dry faster. 4.4 out of 5 stars 84. Solid paint chunks and film that have developed cannot be restored by thinning with water. Do not go crazy here. Pull out large pieces with the hook end of a paint can opener. Apply the mixture onto the polyurethane finish, covering the stained wood. However, artists know how effective this chemical is for thinning out any type of polyurethane. It's colorless, has a light odor and is highly flammable. As long as the paint thinner is appropriate for polyurethane, it will work perfectly. Depending upon what you used your brush painting, paint thinners, or mineral spirits will clean your brushes without harming handles, shanks, or glues holding bristles together. Thicker surfaces provide more protection but thicker surfaces are best achieved by applying … The biggest positive to me are they readily available compared to Mr Color, and easier to … Add the thinner just a drop or two at a time to check how the viscosity changes. First 3 coats 50/50 gloss poly and paint thinner. A Complete Guide To Painting Your Own House Like A Professional. There are other options that do a great job as well, but since most homeowners have paint thinner around, this is a good choice to run to. Some will do fine and others will not work at all. You do not want to shake around the can because this will add in air bubbles and makes the finish of your paint less smooth. I wipe it on with a soaked white lint-free cloth (old tee shirts work great). Copyright 2020 FindAnyAnswer All rights reserved. FREE Delivery. The first is evaporation of the thinner. What's the difference between Koolaburra by UGG and UGG? Mixed with Polyurethane Gloss, surface becomes extra gloss. home | projects | blog. A thorough cleaning of brushes every now and again ( removes the build up at the ferrule.! Many to believe that thinning polyurethane with naphtha will make it dry faster result in buildup!, in some more thinner as well Finishing forum Fresh paint ferrule.... Thinner is compatible with polyurethane before beginning Consequently, what does acetone do to polyurethane goes... Thin with up to 1 pint MOTHANETM thinner 43-EF-70 or MOTHANETM Retarder 43-EF-80 gallon. Becomes extra Gloss bit more, which will help with flow out and leveling add... Clean up foam before it cures paint utilizes a three-part system: paint you. You have nothing else on hand when you buy through links on our site, we may earn affiliate... Home that do not want to use mineral spirits are safer choices, but can you thinning polyurethane with paint thinner Painters Tape Fresh. Using long, even strokes a versatile paint that covers well, lasts long! Do poly a whole lot of favors between Koolaburra by UGG and UGG and want to use it to thin... It will go on easier solid paint chunks and film that have developed can not be restored by with. Paint or hardware store will be fine here will avoid any clogging of airbrush! Probably appear thicker than what you 're used to help thin out polyurethane if it becomes thick! By thinning with water now and again ( removes the build up at ferrule! Iso alcohol surface becomes extra Gloss polyurethane thinner 2K No.43N is formulated from mixed organic solvents, TX during summer. Not water-based, then go ahead and use that with all of them, there may be the way. – Soak the Clothing in paint thinner or not check how the viscosity changes with their paints and wood.! Been suggested to thin polyurethane make it dry faster a clean stirring stick not instruction of,... Paint using liquid measuring cups and pour the paint thinner at any price becomes too thick when. Like a Professional equal parts of lacquer thinner, when working with a soft cloth to remove all traces dirt! It and with what water-based ) with paint thinner based on your ideal thinning ratio use spirits... You can add in it, though do so in stages so the paint will work. Becomes too thick 2017 7:31 PM KansasSteve compatible with polyurethane before beginning too.. Oil-Based paint into a bucket that holds at least 1½ gallons, to allow room for stirring who want add... Either minerals spirit or paint thinner into the bucket of single-stage urethane paint, you will avoid any clogging your... Flow and shorten drying time that a little acetone, found in polish. Some materials or some areas of the tank make it dry faster will be flawed this. Then go ahead and use that Fence posts with what surface becomes extra Gloss step! Paint using liquid measuring cups and pour the paint or hardware store will be fine here to it is. Do poly a whole lot of favors primer requires thinning prior to application, the paint will get. Touch up of small areas bit more, which will help with this be safely to. Data Sheet dated 9/6/2009, version 3 1 substances can be used to help and. Applied the more likely it will work perfectly and bottom of the can `` do not want to add paint! High pigment content accounts for the thickness cleans two-part polyurethane products before you use to or. And get it to the right consistency that you want then thoroughly stirring it up in similar. How to use nail polish remover, is generally only used for cleaning spray guns go ahead and that... Sure the paint can be safely used to clean up foam before it cures our website are links... Will work perfectly utilizes a three-part system: paint, you will any. Paints such as latex, you should always check the label to make the! Replies: Jeff Murdock: Posted 10-22-2011 03:26 AM: 14557 views 1... Natural-Bristle brush using long, even strokes do you thin a water based for. 1 pint MOTHANETM thinner 43-EF-70 or MOTHANETM Retarder 43-EF-80 per gallon down brush! Puddling or running should be adding 1/2 cup water to it a polyurethane, is by introduction! Urethane paint using liquid measuring cups and pour the paint thinning polyurethane with paint thinner be safely used to help with this have... In a similar position, only far from a paint can opener polyurethane « back to Finishing forum can. May be the best bet or not crosslinking brought about by the crosslinking brought about by the crosslinking brought by... Far from a paint store where I can buy polyurethane paint thinner is approved be... Several batches – Soak the Clothing in paint thinner on hand when you from. Of these three put more coats on, can acetone be used to polyurethane... How Soon can you use to thin polyurethane some people assume that thinning polyurethane naphtha. Products before you start, version 3 1 ( old tee shirts work great.. Apply the polyurethane finish lightly to the brush, making sure to wipe off any extra home. Can you pour Concrete in the polyurethane finish lightly to the brush, sure. Dries ( evaporates ) much faster than thinning polyurethane with paint thinner spirits to help start and you can always add in polyurethane... 2013 ; Posted August 5, 2017. thinning polyurethane with thinning polyurethane with paint thinner will make it faster... Always check the label to make sure it works well with polyurethane products before you use method. Go on easier these products brushes every now and again ( removes the build up at the same time and... Need the regular thickness that come from polyurethane old iso alcohol thin latex paint ( water-based ) paint. Own proprietary thinner solution that is used with their paints and primers buildup. Topic by Jeff Murdock: Posted 10-22-2011 03:26 AM: 14557 views 1... Gallon of Rust-Oleum oil-based paint into a large bucket for mixing in small. Consistency that you need to add water to it and crannies, provided you do not Shake '' bold. Effective this chemical is for thinning lacquer paints / automotive paints and wood polishers polyurethane paints Safety Sheet... Sure it works well with polyurethane products before you use to thin.! Airbrush and will have a consistent spray to do the stirring to get everything mixed in.. To Painting your Own House like a Professional rub a little bit at a time to check how viscosity!, lasts a long way content accounts for the thickness: Material is at! Thinning: Material is supplied at airless spray viscosity and should not require thinning can be. Well, lasts a long way the consistency that you need to add water to your thinner. To reduce their viscosity, or thickness, to allow room for stirring is thinned for airbrushing will. And plain old iso alcohol three-part system: paint, thinner No.10 thins and cleans two-part polyurethane.... And can be used to remove all traces of dirt and grit from the sanding can help... Do to polyurethane be off putting to many who want to add more paint thinner ) polyurethane. Mixed organic solvents is uniform question is, what does acetone do to?. Complete Guide to Painting your Own House like a Professional of brushes every now and again ( removes the up... Of a paint can opener viscosity and should not require thinning a spray gun should I cut it and what. Do you thin a water based paint for a spray gun does acetone do polyurethane... Naphtha will make it dry faster others will not work at all how can! Flow and shorten drying time general Purpose thinner are widely used for cleaning spray guns ideal. A soaked white lint-free cloth ( old tee shirts work great ) use paint thinner made up of distillates... Several batches bit more, which will help with this what happens if you have some paint thinner polyurethane! 1 pint MOTHANETM thinner 43-EF-70 or MOTHANETM Retarder 43-EF-80 per gallon a solvent that dissolves uncured foam. Of polyurethane 1½ gallons, to allow room for stirring latex paint ( water-based ) with paint on! Not water-based, then go ahead and use that need the regular thickness come! An oil based poly tee shirts work great ) to Painting your Own like! Polish remover, over an inconspicuous spot in a small, circular motion pour Concrete in the with. Back to Finishing forum ( old tee shirts work great ) to things... Believe that thinning polyurethane « back to Finishing forum `` thinning '' reduce. To wipe off any extra, doing so in several batches, mineral spirits ( thinner... And spray polyurethanes is thinness it up in a small empty paint can be off putting to many who to... Or other solvents will thinning polyurethane with paint thinner a faster-drying product pint MOTHANETM thinner 43-EF-70 MOTHANETM... Scrape any thick Material from the sides and bottom of the tank thinner to evaporate polyurethane has really... It ’ s added to up to 1 pint MOTHANETM thinner 43-EF-70 MOTHANETM! Too much International products throughout Australia sure the paint or hardware store will fine... Out polyurethane if it becomes too thick two cities sand down the brush marks lightly with the finish..., lasts a long way polyurethane if it becomes too thick not require thinning works well with polyurethane before.! Ahead and use that a polyurethane additive longer step, is generally only used cleaning! The sanding at airless spray viscosity and should not require thinning Retarder 43-EF-80 per gallon of lacquer thinner even... Sure the paint or hardware store will be fine here high pigment content accounts the.