Hi, seems I found this thread a bit late. I do my suits in fiberglass but I'm doing anew halo spartan set in cold cast alualuminum. All you do is mix powdered aluminium in your resin. You have to stir it a lot so the particals don't settle. Use it as a gel coat the layer your fiberglass over it. After you demold it buff it with mineral oil on a rag then use some fine steelwool to bring out the metal shine. Once I finish my silver centurian il post some pictures. The finish will be identical to your image of ironman you put up. Good luck and hope that helps. Smooth on has all you need for the project plus some great tutorials.