Hey guys. I have a sculpt that is primarily Styrene, with clay and bondo. I am making Latex/polyfoam casts. I bought a 100 lb bag of Hydrocal to make the mold. I've now heard that hydrocal molding plastic, doesn't go well, or it might fuse. If I clear coat the entire sculpt enough times, and greased it down with vaseline, can I use Hydrocal to mold it?