- Pour equal parts of lacquer thinner and denatured alcohol into a small empty paint can. For a better result, stroke the place two or three times so that every part of the polyurethane gets covered. Not enough to be a serious problem for your application. ... - Apply the mixture onto the polyurethane finish, covering the stained wood. Either 91% isopropyl, or denatured alcohol (Lowes, Home Depot, paint stores) should work. At the same time, move any lacquer that might settle on the container’s base or sides. This task is accomplished through the use of chemical paint and varnish removers and light sanding.Assemble equipment. The denatured alcohol will dry quickly and clean the wood. Several substances can be used to thin polyurethane including turpentine, mineral spirits, paint thinner or, in some cases, water. What can I use to remove polyurethane? You can make your brush easier to clean by dipping it in mineral spirits or water, depending on whether you are using an oil- or water-based polyurethane … Polyurethane can be removed using solvents that can be found at your local hardware. 23. Thinner or denatured alcohol can remove polyurethane for the most part. Wipe the brush off again on a rag, working as much stain out of the brush as you can. … Apply stripper using a brush. You can use a regular paintbrush to do this. No Result It depends on what kind of polyurethane coat was used on the wood, but there are more general solvents you can try first. Step Two: Mix the Lacquer and denatured Alcohol. Apply the solvent with a cloth rag. Stir the mixture thoroughly with a wooden stick. After the wood is dry, stain, paint or install the untreated wood. Therefore, it won’t strip away the stain. Apply the mixture onto the polyurethane finish, covering the stained wood. I wipe on oil base poly all the time - Minwax does not need thinning, others are noticeable thicker. Pour equal parts of lacquer thinner and denatured alcohol into a small empty paint can. Yes, it will make the product weaker, though I don't know how much weaker. Scrubbing is futile without the right ingredients, so don't rub your hands raw. to thin I use denatured alcohol - but do note - the waxes will fall out of suspension with time, so don't thin a big batch for later-later-long term use. ... Pour equal parts of lacquer thinner and denatured alcohol into a small empty paint can. Use a paintbrush to apply the solution to the polyurethane finish. Not often used because it’s been replaced with polyurethane and other resins, shellac works best if thinned with denatured alcohol. Now, you will need to apply the mixture to the polyurethane finish. The alcohol should dissolve any stripping solvents on the first pass. Ensure you rub with the grain so as not to introduce any scratches that may become visible when the finish has been applied. Mix with a wooden stir stick, scraping into the mixture any lacquer from the base and sides of the can. Mix equal parts denatured alcohol with lacquer thinner in an empty paint can. Take a wad of 0000 steel wool, liberally wetted with denatured alcohol, and wash down the piece one area at a time. Polyurethane is a clear top coating applied over wood finish and paint. Step 3: Use The Mixture To Remove Polyurethane. … Brush stripper onto an area adjacent to the area previously stripped.More items…. Epoxies can be thinned with alcohol, but don't use the common 70% isopropyl alcohol (rubbing alcohol). The advantage of this mixture of denatured alcohol and lacquer thinner is while it will remove the finish from the surface of the wood, it’s not strong enough to damage the wood itself. … Scrape the area with a plastic scraper or plastic putty knife. 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