it can be a hard to paint it really cleanly though, well that's what I found in the end. You tend to get stray hairs where you dont want them. If you can I would make a proxy object of where you want your fur and then paint the fur on there rather than on the main model. Then make the proxy non renderable but leave the hair to render obviously
Alan
Technical Director - Framestore
Currently working on: Your Highness
IMDB