Faux Finish Mahogany wood grain foam crown moldings. We are the first to manufacture a "molded" polystyrene crown molding in North America! Our crown moldings install with simple painters caulk. No nails or fasteners are needed. Our crown moldings have a patent pending flat-back design that allows it to be cut in most any position in most miter saws. Paint with one coat of water-based paints. br The surface is hard and has a no "bead" look.