Yeah, pretty much all ballistics gel starts melting pretty quick just in room temperature, IIRC. Sucks as I'd love a ballistics gel head too, although I'd imagine clear resin would have almost the same look.
Sounds good. Can't wait to see how it turns out.
I was just reading up on ballistics gel, and it sounds to me like it has a short life span after demolding? But most of these were "home recipes", perhaps the good stuff is better..Off to do some more reading...