vacuum for molding bodies
#16

Waxing the inside of the lexan would keep anything from sticking to it. Something like turtle wax that dries to a white film would be similar to what we used in shops class to keep polyester resin from sticking. You could use plaster of paris for the mold. We used something called WEP, water extended polyester. It was a polyester resin similar to that used for fibreglass work, but you added water to it and it became milky. You mix it with a mixer end you put in a drill, like used for paint. It hardened to a shiny plaster like appearance and was very strong.