All done with detail brushes. The only time I use an airbrush is for base coats, which I inevitably paint over with highlight layers. I keep trying to get Kenny, the owner of Next Level Painting to give me lessons, but the man is always so busy.
So .. I don't play Warhammer, but a friend of mine does, and he showed me your work. This is super pretty, and extremely detailed, and awesome. I honestly don't think I have the patience to sit down and hand paint each of the little guys that you all do when you play. It's definitely admirable. :3 I'm more of a costume creator myself, but I can admire the talent it takes. ^_^