Here's Captain America Steampunked with gears and cogs for you. His base body was Air Strike Wolverine with Loki legs, Lex Luthor right hand, Medieval spawn left hand, X3 Juggernaut feet, and a DC Direct Dr Midnight head. His shield is pretty much scratchbuilt using a circular base, fitting all the gears/cogs on to the face, and building a styrene frame around that. Different modifications attach underneath it to give the illusion all sorts of machinery is folded up inside waiting to pop out! You didn't think those gears were just ornamental did you? I even used tiny gears for his helmet wingtips.