So, found out at the venue that the Backstage paint wasn't water based. And I learned that grease paint sucks. It smeared like crazy (had to throw the hairspray away, they wouldn't allow it into the venue) with the slightest touch. I ended up only doing black lines and not painting my face red. My friend tried and ended up looking like shit because the paint smeared all together.
It seemed like it way okay until I started headbanging. My hair stuck to the paint. I was constantly having to push it out of my face. I eventually ended up pulling my hair back Olli-style.
Washing the paint off was a pain. It basically just smeared around my face.
When I got home, I took a shower, which got most of the paint off my face, but not out of my hair. So I've got black spots all throughout my hair (and I have blond hair, so it's noticeable). After I got out of the shower, I realized all the paint from my forehead had run down into my eyebrows. So I've got black eyebrows now too.
Don't use greasepaint.