My local FanForce group just got our vacuforming table up and running, and the need for moulds arises. I know how to make my own mould from scratch by making a cast of a plasticine or wood armour piece. However, how would I go about making a cast of an existing pice of armour, such as a gauntlet or a helmet? My friend has made some plastic gauntlets, and I would like to make a cast of them so I can vacuform off of them. Plaster heats up quite a bit, so I don't want to damage his gauntlets. Any suggestions??