Inferno 182 would look great
i used to do stuff like this
The brushing is done very well!
Was it all rebrush or did you c+p + overbrush too?
Definatly show me some of your stuff some time dude.
Basicly I did the line work using a combination of the brush and marques (pic 2) then quickly blocked the basic colour / shadows in behind this layer and used a softbrush at about 80% opacity to add highlights. I finished by tinting some of the black brushwork to match the robots tones so it wasnt too hard edged and placed a few highlights. It still needs some work but I dont like to spend too long on these things. Photo's were only used for reference I painted it all by hand, the tyres were the worst part but the marque tool is my god.