Thanks!
And I meant to say that the hair is actually quite simple! I first highlighted every hair with a very dark gray (a bit lighter than Vallejo's German Gray iirc). Then on all of the surfaces that would reflect light I used a dark gray (P3 Greatcoat gray), finally I used a gray to do the actual bright parts (IWM gray).
I look forward to seeing everyone's wonderful shiny black hair!
n.