this is usually called lost wax. look for something called victory brown
casting wax. you can also use silicone and/or various types of rubber, which
you'll need if your mold has any undercuts in it, or you don't want to
destroy the mold to get the object out of.

regards,
charlie
http://glassartists.org/chaniarts

"HotRod" wrote in message
...
Does anyone know of a plastic that I can buy at my local hardware store
that I would be able to melt and pour into a mould? I just want to
practice and create a few parts from plastic before I try and use metal?