The first is the original scan, the second is post-Photoshop, with no background for simplicity.
I am pleased with the structure of the sketch overall. It flows naturally, even though much of the form overlaps itself. This is a fairly typical dragon for me, although the head is of a more rat-like and less horse-like then I tend to.
The color was done with a method I am still working on streamlining, which involves extensive use of the erase tool set to a low opacity. The shadowing will be move obvious when there's a background, or really a ground of any kind.