Thanks for the reply. I am casting a shoe with no undercuts. I want to pour a 5 or 6 pound foam into the plaster mold. I really don’t want a waxy or oily mold release that will make painting the casting impossible. I assume a wax or oil release will be all over the part when it comes out of the mold. I will have to clean the part before painting and I don’t even know if that is possible. Can I use a powder as a release?