Gaafy gave you some good cnc imo.

The thing I would fix up most here would be the focals right (our R) shoulder I would darken that section up more becuase atm it seems that it has some kinda white odd filter on it. As well I do agree about the white light on top of focals head.

Overall I think the colouring is wicked, just need to boost some that is hiding behind the effects, I think that would be a nice touch for realism, imo your on the right path to some wicked detailing ^^