I have used paint that is for plastics (rattle can from hardware store) and it didn't melt the foam, but I only used it to get my outline. Hi : Being new doesn't mean I can't be helpful . Typical waterborne paints are acrylic or vinyl lattices used for painting building interiors and exteriors or water-soluble industrial paints. Painting XPS rigid foam board (Kingspan GreenGuard) [there doesn’t appear to be a way to post j text in this forum but basically I j want to know how I can paint XPS] Close. Spray coating / painting XPS foam. You can paint polystyrene foam or expanded polystyrene beads using a waterborne paint to protect it from solvent attack by subsequent coats of paint. Any easier ways? I won't be able to side it until next year, leaving the foam exposed to sun and elements. Hi all, I've watched a few of BMC's videos on creating terrain with XPS foam. I generally use an acrylic spray paint made to use on foam products .if you are looking to base coaat for setup and beginning your scenics Use this . I have heard that acrylic paint can seal it, but I just wanna double check. I put on a house addition with XPS on the exterior. Is it advisable to coat it with a latex paint or housewrap? I have painted over finished boards using the same plastics paint many times. The foam needs to be sealed so it can withstand a … Then the paint roller should be coated evenly with the paint. For me personally, one of my least favorite things to do is base coat or paint multiple large surfaces by hand. Go to Home Depot (any bix box store) and check the paint department for discards or returns. The gesso acts as the primer. I need to know of an easy way to seal polystyrene, or insulation foam. Now , that said I get my products at Hobby Lobby cause it's closest and the products they sell can be used on model railroads. Step 2 - Choose Supplies and Prep. The sanding of the foam insulation is only essential when doing craft work or decors. I haven't tried glassing over painted XPS or EPS foam. Basically I got 3 for the price of 1, all premium paint. Watched your shaping video, and I have a couple of comments. This is my first project using these materials so I have a lot to learn. There are multiple types of foam, but they all have a similar weakness with a similar solution. Posted by 3 days ago. OC Help. He mentions that one of his least favorite things to do is draw brick lines. I know urethane resin works, but I don't have any on hand. 1. Put your gesso or latex paint into a paint tray. Hoping to hear from those with experience carving XPS foam forms/dioramas intended to withstand the elements, or even better, forms/dioramas specifically designed to support a working water feature. 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