Polyurethane coatings are made with mineral oil solvents or may be a water based polyurethane, so the answer depends on what you are repainting with, and which polyurethane you are painting over. It will leave the surface looking glossy but not as shiny as other topcoats do. The problem is that nothing can ever be put over wax – not poly, not paint, or even primer in most cases. It was stained with a stain containing polyurethane. It is the nature of oxidation. I put on a few coats of oil-based Rustoleum paint (spray). Q: My childhood dresser is beautiful but the wood stain looks faded. If I wait longer than that I have to wait 16-24 hours and then sand. If the spray is wet when you apply the poly the spray might run. WHAT YOU NEED TO KNOW ABOUT WHITE PAINT: Bright white paints can yellow over time with or without topcoat. Don’t worry it will dry the same color and blend right into the original paint! However, if you choose the water-based Polyurethane, you can opt for any paint sprayers as most of them will provide you efficiency with water-based paints as well as Polyurethane. after the latex or other water borne product has cured, generally specified on the label, the polyurethane cannot penetrate or reactivate the paint. You don't have to remove all the varnish before you start painting. Yes, you can spray paint over rust. Oil based spray paints can take up to a couple days to really cure or dry completely. A polyurethane finish can prolong the life of paint and prevent ultra violet rays from causing it to fade. Remove loose rust with a wire brush, sandpaper or chemical rust remover. Whenever I want to spray oil-based poly, I go for the spray paint version of the Minwax Fast Drying Polyurethane (linked below). In most cases I have been able to spray my oil base, and come back in 45-60 minutes and spray some poly or poly/varnish over it. Adding polyurethane to wood may seal the sticker, but over time you may still find that it starts to come unstuck. Have good ventilation and wear an approved respirator mask. Before you paint, take the time to prepare your surface properly. Could I put polyurethane over old polyurethane? Remove Loose Rust and Paint. If you are going to then use a water-based poly since it doesn't yellow like the oil based. I am sure the rustoleum spray paint is oil based. In short; you CAN apply a lacquer or a polyurethane over a Danish oil. Put on a respirator. It keeps moisture from damaging the wood. The underlying finish or wood species can affect the final color of light paint. 7. Be sure to wear a respirator mask and apply the finish in a well ventilated area, especially if you are using oil-based polyurethane or using a spray can. Answer + 1. I am painting a shot put, as in a 6-lb iron ball for track-and-field. It really depends on the spray paint dry time. If you are using vinyl paint, then be certain you receive the ideal kind of paint, and then adhere to the aforementioned guidelines to paint and prepare the surface. Can I spray paint over rust? As another commenter said too, the spray stuff is kinda crap. You can as well use a vacuum cleaner, if you have one, to remove all the traces of dirt that remained after roughening. Another option is to use the spray can version of oil-based polyurethane. Polyurethane is typically hard, durable and glossy, and it is these qualities that make a finish vulnerable to chips and flaking. Yes- you can put oil based poly over spray paint. For a smooth coating you’ll want the surface to be as smooth as possible, so prepare the wood by sanding it with a sanding block or orbital sander. Details and inside corners are difficult to cover with any paint color, but this property tends to be more noticeable with whites. When you work on antiques most of the time you can just touch up the finish with lacquer. I sanded off what was left of the old finish. Depends why you want to apply the poly over the enamel. Can i put a minwax polycrylic brush on gloss clear coat over a piece of spray painted wood? Answered. I put 2 coats and it still came off. 5. If you spray poly on too soon, that moisture has nowhere to go and can cause the whole thing to buckle or flake (or not dry properly!). This post contains affiliate links for your convenience. Of course you need to test in a inconspicuous place to be sure. Some people choose polyurethane over spray paint, polycrylic, or other finishers because it has a more durable finish that does not chip or cracks over time.In general, polyurethane is your standard “go-to” all purpose finisher. Yes, you can paint latex paint over polyurethane stain after applying an oil-based primer. With some prep work and these simple tips, you can successfully paint over polyurethane or other finished wood and give your furniture or trim a whole new look! A light scuff will not give you a solid mechanical bond. Apply the paint. You can buy one at a paint supply store. You’ll get the best results from your topcoat if you remove any old paint, varnish or other finishes before polyurethane application. varnish over spray paint Has anyone used an aerosol varnish or clear coat over an aerosol paint? Polyurethane will seal in dirt, dust and pet hair and preserve it forever in the final finish. Vinyl paints, as mentioned before, are not eco-friendly. The problem is the protective coating over the paint. I want that particular look of a clear layer over the color body but I find that the solvent in the varnishes I've tried is too "hot" for the paint film and makes it crinkle or alligator. Step 7 – Polyurethane or Wax Over Chalk Paint (or skip to OPTIONAL color washing) You may want to use a wax and if so, please follow the manufacturer’s instructions. You should keep your paint sprayers clean after every use. Just as you can over any Drying Oil. Even if it has varnish on it, its so old, hard and dry you can get away with putting lacquer over it as long as you don't flood a wet coat on it. Discussion Starter • #1 • Jul 2, 2015. Instead, you should be using a different type of paint - you can use Minwax Polycrylic. Great clarity, resistance to abrasion and can be polished to a supper shine, doesn't quite have the depth of a poly gloss coat but is as close as you are likerly to come. I did a test piece and it looks fine 24 hours later, but will it fail in the future or start to chip? It is also a finish coat that brings an immaculate shine and magnifies the beauty of everything from flooring to furniture. It is a protectant and sealer. You can do the application using a sprayer or even a lint-free cotton clothing. Your paint will not stick well to a polyurethane treated furniture unless you prime it. Start by cleaning the surface and filling in any cracks or imperfections. A polyurethane finish or varnish is a durable coating that protects a wooden surface, which means you can’t paint directly over it or your paint won’t adhere to it. A varnish (or varnished look) can be achieved with products or combinations of products that include polyurethanes, lacquers, epoxies, etc. Feel free to follow this by applying the water-based polyurethane. Comparing Polyurethane to Other Finishes. Surface preparation is extremely important and is the best predictor of how long your new paint finish will last. Best epoxy gloss coat I've found. I have a butcher block counter top on the kitchen island. Paint the surface with an oil-based paint. How to Use Oil‐Based Polyurethane over Water‐Based Polyurethane. simply put, yes. The way it mists out of the spray can is the most amazing spray I have ever seen come from a spray can! If you can't find a tack cloth, you can vacuum the dust up instead. But with the right materials, and a little bit of elbow grease, you can paint over the polyurethane. Spraying polyurethane with a paint sprayer takes out the most volatile variable and makes the entire project far less reliant on your skills as a painter.. Spraying polyurethane requires a few extra steps to ensure quality but the added effort will leave you with a better-looking finish and less time spent fixing mistakes.. I applied a coat of Minwax fast drying polyurethane on a bookshelf for my daughter's bedroom. If it is badly damaged or if you no longer have any of the paint for touch up or repainting, consider sanding and priming with an oil-based primer and repainting with water-based paint. I’d love to update it with fresh paint and new hardware, but I’ve heard that you can’t get good results painting over stain. In other words you want to know how quickly you can put the poly over the freshly painted oil, without sanding and without causing the oil to wrinkle. 5. Paint is not a varnish. How often should you clean the paint spray guns available in the market while working with Polyurethane? 4 Posts . Follow the same directions on how you applied the primer. ... A tack cloth is a special, sticky cloth for this exact purpose. Unfortunately, when many do-it-yourselfers apply polyurethane over a water-based latex or acrylic paint, they end up with rampant flaking. ; Start with 120-grit sandpaper on refinished pieces and 80-grit on new wood. The key to success is to make sure the oil has fully dried first. Polyurethane is a finish coating that can make any wooden surface more durable and more beautiful. Oil and water are famous for repelling one another and not mixing. yes, I use a 2pak polyurethane by U-pol (S2086EV) with great success. An oil-based primer is your best bet since other types of paint primers are not compatible with a polyurethane finish. Source(s): put water-based poly on concrete floor and oil-based in living room and it looks like pee stains all over the place. Can You Put Polyurethane Over Chalk Paint - Though the paint is a bit thicker than latex, then it does not necessarily cover 1 jacket? You can paint over a surface of polyurethane varnish if you prepare it properly. Any paint will adhere to the polyurethane if and when the surface has been properly abraded. However, if you are lazy to work with painting this coat, you may as well spray it onto the surface you want to coat. You can use a fine bristled brush, a spray can, a lint-free rag, a foam brush, or a roller. You can apply it over your chalk paint finish or any finish using a regular paintbrush. That aside, you are not supposed to use a polyurethane over paint and if you call the manufacturers, they will say "you can try it, but we don't guarantee anything." Purchases made through these links may earn me a small commission at no additional cost to you. 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