As far as solving your problem goes, if the finish has stopped bleeding oil and feels like it has dried hard, you might be able to even out the gloss by wiping the cabinets down with a rag dampened with mineral spirits (assuming it was oil-based polyurethane) followed by a dry cloth. A forum community dedicated to professional woodworkers and enthusiasts. White spots on polyurethane are generally caused by two things: Not stirring thoroughly enough before applying it, or a buildup of moisture. I applied 3 coats, sanding between coats. Apply the finish gently to the sanded area, with as few brush strokes as possible. JavaScript is disabled. Whether it be water based, oil based, oil modified water based, etc. Applying polyurethane in even coats is a crucial, though not always simple task. Is it a water based poly or solvent based? Sand your project with progressively finer grits of sandpaper. All right then, chemmy! I would really hate to strip to bare wood… is there a way of either covering the streaks, making them disappear or removing just the arm-r-seal without removing the gel stain? Hope it's something easier. Then, sand the area with a fine-grit scratch pad to get rid of the old coat. always looks smudgy with any touch even after drying for a week. Typically, two to three coats are used with sanding in between coats to even them out. The streaks are still there. If you are staining an object large enough that you won’t have time to get the excess wiped off without leaving streaks, seek a second person to help. If the coating looks too thick, use the rag to lightly swipe at the area until it is even. Hunker may earn compensation through affiliate links in this story. Brush Marks on Polyurethane Topcoat. Wait for the polyurethane to dry completely and cure as hard as possible. After you buff, the surface should feel buttery smooth. I started with a standard type that I brushed on with a foam brush. Scrub out the streaks, then reapply the stain liberally. Apply the polyurethane finish lightly to the brush, making sure to wipe off any extra. Rather than lecture you on how to prevent the problem first, I’m sure you’re here because you already have the problem. How to Fix It: An abrade and recoat is almost always necessary to repair … Sand down the brush marks lightly with the fine-grit sandpaper. Typically, two to three coats are used with sanding in between coats to even them out. However, the quality and protection of most film building finishes (such as polyurethane, lacquer, and shellac) goes up exponentially on the first few coats (e.g., there’s a huge improvement in durability and moisture excluding effectiveness from coat #1 to coat #2, … Wax a steel wool might work but what I have done is thin the material with appropriate flow control agent and apply a light final coat. Then after that apply 2-3 coats between sanding sessions. Brush the sanded area off with a soft cloth to remove all traces of dirt and grit from the sanding. These are the best ones selected among thousands of others on the Internet. Sand the Surface. Thanks, and I'll get to work on it tomorrow. I used minwax quick drying polyurethane to topcoat a dining room table. After the first coat, I used 220 grit sandpaper to lightly sand the surface as recommended. Wipe on a very heavy first coat on the bare wood. That should be the equivalent of 1 coat of standard poly. To fix this you'll need to buff the floors really well and then recoat them. I have a feeling the streaks are from the steel wool. Polyurethane typically leaves brush marks from a paintbrush whenever it is first applied, but if it is the right consistency and if the proper procedures are applied, the ridges resolve themselves and the polyurethane settles to a smooth finish. He thought they might be stop marks. Wipe On Poly Leaving Streaks- How Can I Fix It? Sanded the second time once dried for several days, wiped with varsol cloth again & recoated. The table, according to the manufacturer, has a polyurethane finish (on top of a walnut veneer). For water-based stains, use a lacquer thinner. Then after that apply 2-3 coats between sanding sessions. How to Apply Polycrylic without Streaks, Brush Strokes or Bubbles How to Avoid Brush Strokes and Streaks. Please help! Applying polyurethane in even coats is a crucial, though not always simple task. Goof 3: It's splotchy. Question. When it’s clean, mark out the section with masking tape. Keep a wet edge. Brush marks often show up on pieces of furniture treated with polyurethane finish, usually despite the best efforts of the craftsman. Well<, I had to do something because my poly finishes sucked. While preventing the white spots is easier than fixing them, you can fix them by sanding down the high spots and then drawing out the moisture. Sanded with 320 & then 400 grit sandpaper on a block. Hardwood floors in a home create charm, style and resale value with very little maintenance. Thanks again HerrBag! You could use lacquer or conversion varnish if you are into solvent based finishes. The most detailed guides for How To Fix Polyurethane Streaks are provided in this page. Note: Paper with a … Are the streaks going to be stuck there / should I just paint it black instead? Let it sit a few minutes and watch for dry spots forming where it soaks in. Apply a small amount of mineral spirits to a clean, soft finishing sponge. This will make sure that the area doesn't get too much finish. Finally, wipe the excess amount away with a rag right away. However, there is a way to remedy these flaws without undoing a day's work. Start by washing the area with soapy water. Polyurethane isn't going to hold up well. So what I used is Minwax indoor/outdoor Helmsman spar urethane, in clear satin. As a protective measure I've started down the path of putting some coats of a Satin finish polyurethane on them. Last summer I was asked to troubleshoot a job for a relatively new contractor. Some tree species contain pockets of sap, which cause the wood to absorb stain unevenly. That should be the equivalent of 1 coat of standard poly. Thanks eagleeye and cabinetman. Wipe off the excess with a rag immediately. Avoid Hard Spots on Your Applicator: Streaks can easily be caused by hard spots/stiff bristles on your applicator. Buy the epoxy and do it right. Apply 3-4 coats before your first sanding, that should seal in your stain. Polyurethane typically leaves brush marks from a paintbrush whenever it is first applied, but if it is the right consistency and if the proper procedures are applied, the ridges resolve themselves and the polyurethane settles to a smooth finish. Another coat of poly goes on very thin and requires way more coats than a brush on polyurethane with dust! 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