Hey Ben,
I sure can and the simple answer is Hypershot. Its a great progam for texturing and rendering as it has a whole load of preset textures and you can scroll through them and then find the 1 closest to what you want and tweak. For example on my model i think i used the Chrome Dark Material for the large panels, and changed the colour to the dark red and increased the roughness a little to get a more matte effect. Its as easy as using the fill tool.

All the panel lines were drawn on after in photoshop as texturing these for a still would just be a waste of time. The other photoshop parts include the flame (and highlights) and just general tweaking of the image.

Nizzis pipeline for creating robots like this is really about speed rather than accuracy on the 3d models. So use the program that will be fastest to do what you need.

If i were doing this for an animation then i would have to go in and create UVs...etc. But as im not why waste time?