Actually, no one has asked me that yet. I really should write a blog about how to do it, but its not terribly complicated. Just as you said a stencil and some spray on hair coloring. It tends to show much better in photos with the flash. Surprisingly you can do totally different designs on both sides. The TurkeyHawk and the picture in my profile were the same mohawk just colored differently on each side.
hey i posted some more of my drawings. haha thanks thats cool to hear. hopefully by the end of this year i'll be goin to college at the art institute of las vegas. i wanna be an animator and i'm thinkin about tattooing as well.