How much experience in PS have you got? Blur everything that isn't an outline, give it as little posterization as possible, copy the layer, plastic wrap it, go to blending options on the plastic wrap layer and lower the opacity. This is just a guess, and am sure there is more to be done, but this should get you on your way to doing it.
It looks like the plastic wrapping only adds white spots to everything. Diffuse Glow didn't do much of anything. I have a feeling that every inch of this was drawn. With Wacom or not, it seems like some of the features are too drawn and defined. I also tried a bunch of gradients and even painting with a brush. Nothing really comes out the same.
How would you do it?
I have a suggestion for you create a blank layer, use one of the light(pin maybe) modes take your paint bucket fill the blank layer with about 20/25%fillWith color just a bit off from here skin play around with shadow effects .some interesting results will follow then select areas on new layer and delete, feather of coarse of and G blur about a pix or