Still waiting on delivery of a Spiral figure so I thought I'd get started on Cable's X-Force team. Piotr here uses Thunderball body and legs with Astonishing Colossus head and arms. Sculpted the boots and buckles. The shoulderpads, collar and chest armour is darice so as to maintain full articulation.
It's sheets of craft foam. I use it a lot as it paints well and allows a bit more posability over joints than apoxie