Plaster and canopies for plugs
I was thinking, the easiest way to make a copy of a canopy or other vac formed parts would be to make the plug from Plaster of Paris, but, what do I use as a mold release agent to prevent the plaster from damaging the part? I have a few parts I want copied so I can duplicate them in case my thumbs do something dumb, and these parts are no longer available.