First step of my Wrex costume is done: The headsculpt. Photos are posted!
Sculpt was done in Chavant NSP Medium. I'm going to cast it in Rebound 25 rather than plaster (because the undercuts of his spines on his headplate are WAY to complicated), and then the final piece will be latex foam. I'll be wearing a hardhat underneath and see through his mouth.
Final intent is to make the mouth moveable so I can close it, so the foam will of a necessity be a softer rather than a hard foam (I'm thinking FlexFoamIt! 5).