Critique
Not a bad attempt at the modeling, although the polygons are much higher than remotely necessary.
For your texturing, I see the same generic scratched metal finish, need I reference it's page on CGtextures?
Try painting a base texture, hand painted always works better, and blend colours using different opacity levels. If you want to add an additional touch, put the scratched metal on a different layer, erase some of it, and try different blend modes.
You're making good progress though.