I have been making my own resin dice for several years now! I use two part by volume epoxy resin, and make my molds out of silicone and existing dice. I have made three fully successful sets (two as gifts), and a whole bunch of themed single dice (also as gifts.) Resin is a very interesting medium to work with, and I really enjoy experimenting with combinations of mica powder, flakes, and alcohol inks. I polish with Zona papers and ink with acrylic paint.