If you were to use a bare metal shader, it should be very sparingly. This armour looks more like it has been painted with matte green, and that's a good thing. Personally, I'd rather put some CM_Bright on the orange bits, since they look like they should be glowing lights.
Excellent texture work, I really get a sense of how tactile it would be. You might want to increase the contrast of the green kneepads and thigh plates, since they're looking a bit flat and undefined.