Hello All, I am attempting to cast pewter for the first time, pouring
directly into rtv silicone rubber molds. The surface of the casting
( a pendant) is very rough. It is covered with “dimples”. It looks
like somebody took a tiny spoon and took out little scoops all over
the surface. Does anybody know what might cause this? FYI the
compound I’m using says the rubber will not attain its optimal
physical properties for 6 days after vulcanization and its only been
3. Could this be part of the problem?