Very Nice I think the last step needs redooing. You can add much more light, shadow and contrast, and sharper too. If you want the modern Marvel airbrush look (( http:// ) marvel.com/comics/onsale/covers/USM054_0304.jpg ) you need very fine detail. Personally I like the older style black inked shadows better. In your case, the blue shadow could be as dark as RGB = 70,90,110
I wasn't going for this style, I wanted it to look like, and prefer, a cartoon style, rather than a serious look (eg marvel)
Cross hatch shadows were inapropriate for this drawing, but I like to do them, sometimes.
big10p, Most stuff like this is actualy vector art, using lines and beziers. But in the sense I think darklordz and lucid meant it, it doesn't really apply.