We sent a wax copy of the Spartan to a company in Canada. They did a 3-d scan and with their milling machinery created a life size version of the Spartan. I will do a bit of carving in the foam and then coat it with clay and refine it even more.
The foam is a great way to get a head start on your larger work. The sculpture ends up requiring less clay and time to get to the finished piece.
