Halloween // The "Other" Mother Costume

I need advice from all of my fellow Halloween Lovas! Every year I throw a pretty big Halloween party and try and "outdo" myself each year in my costume. This year I want to be The Other Mother from Coraline! She has a VERY sculpted face (crazy cheekbones), what would you use to create this sculpted skeleton-type face? I keep going back and forth on materials to use. TIA