"Roy" wrote in message
...
How about using wax..it would IMHO be a bit more suitable. Plastics do
not flow well even when melted. Usually plastics use a high pressure
injection system to fill a mold, where metal can be sand cast,
pressure cast, centrifugal cast etc etc......so unless you have a
means of injecting or forcing the melted plsatic into the mold it may
be a big headache to try plastic. Just my 2 cents worth..


Yep, injection molds use very high pressure. I think wax would work much
better.