You have asked a "How long is a piece of sting" question.
Do you want to cast concrete, plastic, resins, iron, alum, pressure filled, vacuum filled, rotational hollow casting, positive casting, negative casting, lost wax, etc.
If you have a specific item let us know and I am sure we could point you in the right direction.
I have done a little with concrete and pourable resin moulding, I do know some other methods too.
Maybe you dont want to tell us what it is you have in mind, but i am sure you can give us a rough idea without any of us stealing your good idea
