I'm really liking the bleed out from the belles eyes looks disturbing. You were asking about some comments on the skin? I like the paleness you have achieved, to add a bit of depth try using a blue glaze in the recesses and then highlight the raised surfaces to the original flesh tone (could also be done with green or purple depending on the degree of decay your after)
Check out my painting blog, last page I believe there are some belles I have done recently with said technique