Multiples: Stressing

Ive been pretty stressed out this week trying to figure out how im going to create the moulds for my shoes, ive just finished up the plaster moulding with Alison and i think that the plaster would be able to take the heat of the melty plastic stuff ive bought. Its really annoying me i tried to make test samples of how the condoms would suspend in the utee (ultra thick embossing enamel) in yoghurt pots but they just melted away. Thats what triggered this whole stressy thing for me. I need to get a material that isnt going to melt due to the hot enamel, ive already bought the stuff and im just gonna run with it or its a waste of money but i really wish i had just gone with resin.