We use a substance called Rigidax for machining impeller blades. It very similar to a heavy duty wax. We simply heat it up, pour it into a mold and let it set. When your done, heat it up and melt it out. It's kind of messy to machine, but it sounds like it would work for what you're trying to do.
__________________
I don't know much about anything but I know a little about everything.... |