I haven't tried glassing over painted XPS or EPS foam. XPS can be a very useful material - it shouldnt be given such dismissal so easily as the forum members here like to do. Step 2 - Choose Supplies and Prep. 1. Watched your shaping video, and I have a couple of comments. I need to know of an easy way to seal polystyrene, or insulation foam. 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. Any easier ways? Typical waterborne paints are acrylic or vinyl lattices used for painting building interiors and exteriors or water-soluble industrial paints. OC Help. The sanding of the foam insulation is only essential when doing craft work or decors. There are multiple types of foam, but they all have a similar weakness with a similar solution. I know urethane resin works, but I don't have any on hand. Spray coating / painting XPS foam. Posted by 3 days ago. Basically I got 3 for the price of 1, all premium paint. This is my first project using these materials so I have a lot to learn. I have heard that acrylic paint can seal it, but I just wanna double check. I won't be able to side it until next year, leaving the foam exposed to sun and elements. I was able to pick up 3 different colors, chocolate brown (satan) for the fascia, tan (flat) for the pink foam and light blue (flat) for backdrops, all for $9 each. The foam needs to be sealed so it can withstand a … I have painted over finished boards using the same plastics paint many times. 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 . Put your gesso or latex paint into a paint tray. You can paint polystyrene foam or expanded polystyrene beads using a waterborne paint to protect it from solvent attack by subsequent coats of paint. Hi all, I've watched a few of BMC's videos on creating terrain with XPS foam. He mentions that one of his least favorite things to do is draw brick lines. Then the paint roller should be coated evenly with the paint. 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. 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. I put on a house addition with XPS on the exterior. Hi : Being new doesn't mean I can't be helpful . Go to Home Depot (any bix box store) and check the paint department for discards or returns. Is it advisable to coat it with a latex paint or housewrap? When foam insulation is installed on walls, sanding is not necessary. The gesso acts as the primer. For me personally, one of my least favorite things to do is base coat or paint multiple large surfaces by hand. 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