If you look closely just below where the hair parts, on the skin, you can see a small amount very fine striations that are not hair. These also seem to be present over the scalp as far as I can tell, but I don't think there is a hair coloured layer of paint or anything (if you look at the parting you can still see a degree of flesh where expected). Trust me when I say the picture I posted does not even come close to viewing this in hand, in my experience camera's seem to pick up every dust particle etc that the eye does not resolve in the same way, never mind what over processed pictures seem to portray (the picture in your post, that they themselves provided, shows edge detail being blown out and haloing; and as a result looking horrendous and doll like; just look at the outer profile of the hair for an alternative example of how unreal\unnatural the edges look).
This is truely museum quality, if it wasn't I would flip it for 1.5+ times what I paid in a heartbeat. I'm sure the Joker will also show the same in hand difference that Wonder Woman does vs the available pictures