I might test the Krylon clear spray paint … Polycrylic can be applied over latex paint. Do not apply water-based polyurethane over the top of gloss latex and acrylic enamel. This is a wipe on poly top coat with a matte finish that claimed to be non yellowing from the brand Fusion Mineral Paint. I guess I can do the tray in an enamel. To apply this product, however, you will need to allow the paint … The enamel should have a product rec to put over it if required, but this isn't really a situation where you need to put any protective top coat on at all. The polycrylic does say it can do this to latex paint. My answer and experience is different. Wipe On Poly Over Paint Product Details. It looks bad. I used Minwax Polycrylic over pale grey Valspar Chalk paint and the Minwax Polycrylic left yellow streaks. So, to properly apply polyurethane over paint: Step 1: Wash the surface. I was really hoping to NOT repaint the chair. While it may be possible to get the polyurethane to adhere to the original coating, there will never be a great mechanical bond. If you know the paint was manufactured after 1978, you can prepare the glossy surface by cleaning it thoroughly and sanding the surface with a light- to medium-grit sandpaper to remove the sheen. I had such good results then that I'm putting three coats of Polycrylic over two coats of Sherwin Williams ProClassic Acrylic Enamel … Having said that, it is best to allow the paint to be cured for 30 days, if new. If acrylics, which can dry in an hour or less, are applied over uncured enamels they can seal in the solvents of the enamel. Other types of paint would have to be tested on your own for compatibility. The clear enamel would do just fine, but it's not going to … For starters let me introduce the actual product to you guys. … Water-based polyurethane is well-suited for low-sheen flat, eggshell or satin latex paint. Painting the surface with a high-adhesion primer may also help the semigloss enamel … Now it seems to have come out of the closet. If you painted your cabinets with any of these paints, apply a water-based poly over the top to prolong the life of the finish. Grease stains, dirt, dried mud, and any sort of other filth needs to be washed off before you can apply the first coat of polyurethane. Minwax Polycrylic. In about 2008 when I reported I had used Polycrylic over WB enamel, I was run over by the WoodNet train. This polycrylic … “the only products we offer that will be suitable for use over paint would be the Polycrylic or the Water-Based Helmsman Spar Urethane. Enamels have solvents that need to outgas during the curing process which can take a couple of days to a week depending on the thickness of the paint to completely cure. The paint on the test board is the exact same paint and it is ambering instantly. It doesn't appear to be tannins or anything seeping through. 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