:O Nice use of colours, the crack in the helmet is just bothering me for some reason, though. xD
Otherwise, it's really beautiful!
nice one, though there is a stray pixel in pure black (0-0-0, 8th color!) in the down left corner.. edit is here
The line work could be a bit better but it adds to the battered look that the colours lend it.
Good job and one of your better pieces.