I think its pretty good.You can clean up the outer edges with the eraser brush set on low opacity and a large brush size, it lets you pic away at the little edgy things here and there. Any that remain can be minimized with the blur brush on low and a small size..You did well on the shine! Look in the forums, there is a link (just put in there in the last day or so in one of the threads, for the Lascaux Tutorial in the wiki.. I would post it but I am at work and don't have it stored here.. I will look forward to more of your work.
drawn in 57 min