First, a professional foundry will probably not use either method, but that
is not so relevant. What is relevant is who makes the pattern. If you do it,
the cost is low. If the foundry does it, the cost is much higher and it is
dependant on how much time it will take to make it. You can do your own
arithmetic. In all cases, prior consultation is necessary between you and
the foundry on who will do what. In most cases, the foundry will want to
make a sand casting with a conventional cope and drag boxes, this will drive
the pattern cost.
Steve

"Charles P Lamb" wrote in message
. ..
What can I expect a foundry to charge me for an Aluminum casting? It
would be about the size of a softball using either lost wax or lost foam.

Thanks