I love the accuracy of the shading and how well you modeled it after iron man.
Simple and beautiful. The set might well become a classic.
I personally find the gold part of the face to be too narrow. Dunno if it's too late to fix that or not. I noticed shading is different on the right and left sides of the head and textures. Is this due to bumpmapping? Or did you just draw them that way?
Scratch my comment on the head. Looks like you got it fixed!
Fingers ands could look more like armored parts. Now they look more human. They are great fingers, they just don't scream iron man like the rest of the set.