Here's my more finished shot, with colour. The colours aren't exactly accurate to the model sheet, but they can easily be fixed.
EDIT - Matt isn't happy with how I've drawn this chappy unfortunately. Have given him the files so that he can update the look to match his style better. Can't help feeling a little frustrated with myself, espesh since I was quite pleased with the outcome, but Matt's boss, and I'm sure he'll make it a lot better.