What mold material do you need?
Depends...Long term steel is best.
Aluminium is a good second...
I am going to be upgrading to an auto caster soon so....
It just gets weird after that!
For one off stuff I could use green sand or ceramics and the list goes on.
Are you in the machining business?
You could make some dough cutting molds and put up a sign saying "due to the overwhelming volume of requests we are not taking on new business"
TES
Oh...and heres more from the same guy...

