Deltadave:
The other reason for using a permanent medium, is that it is permanent.
I sculpt individual miniatures for my own enjoyment and use. They would not stand up to painting and gaming if they were made of wax.
Sculpey, Green stuff, Magic Sculpt, Apoxie Sculpt and others provide that permanency for me.
(the side benefit is that they could be used to replicate if I choose to ever do that.)
In addition, a lot of sculptors have to ship their work to be cast. I'm not sure how a wax sculpt would hold up in shipment.
Just some ramblings from the nyrfherdr...
Game ON!
Nyrfherdr