It's a nurbs model , I am using Maxon's 3d body paint for textures , I will make it look "old and rusty" when all the changes is implimented.
Aztek , I looked at the counter sunk rivets , this model started and it's main purpose still is, when it is finished to be "grown" with stereolithography in a real toy. The counter sunk rivets won't show well , and you won't be able to feel the rivets on the body panels on the toy , the rivtes need to protude a bit . I have however started to create the counter rivets just for the render , I think it's going to look great , I will post it when finished - I hope this make sense ?