This looks to be a super useful thread. I have some experience with injection molding (former polymer chemist, silicone tentacles for Cthulhu costume, etc.) and I think I'm going to take a crack at this eventually. It has been a while since the original post, I'm wondering if you have changed your advice on starter resins. My current amazon considerations:
Mold: OOMOO 30 or Alja-Safe
Resin: SmoothOn 320
Release: ethanol, olive oil, Triton abomination I make or maybe some store bought stuff.
Any thoughts before I go do something stupid?