I’ve been messing around with acrylic resin - it’s proved pretty easy to get surprisingly good results, so I thought I’d share. My method for the projects below has been to sculpt something in Super Sculpy (a polymer clay) then bake; make a mould from it with 2-part silicone putty; then cast using 2-part epoxy resin mixed with pigment. Metallic powders and a bit of black pigment get added to the resin to make brass and bronze effects, with the finished pieces polished with fine-grade wire wool. Resin can be layered in different colours too, which is how I made the enamelled labyrinth brooch pictured. The black and silver tokens in project one were made by adding black pigment to the resin, then dry-brushing on some silver Rub N’ Buff.
I reckon it’d be fine with melted wax (though you couldn’t heat it directly). I’ve used it to make a 2-part stamp to press designs into damp paper for personalised stationary.