dave at
mitton.com wrote:
Yes, the keyword you want is "resin
casting".
Google "DIY resin casting" got me a bunch of good hits.
Typically small parts molds (either a actual or built prototype) can
be made using RTV rubber
and cast using an urethane resin. Search using some of those terms
and you should
be able to find some good instructions.
One thing I learned about this is that not every casting material
will behave the same way during casting and curing. Resin-based parts
typically retain the shape in which they're made, but some quick-cure
casting compounds will warp to an amazing degree as they cure.
In other words, buying a casting kit expecting to use some other
casting material is not necesssarily a good idea.
Doc