Questions About Body painting

My cousin just returned from Key West-he was at the fantasy parade with his GF. He told me that many of the women in the parade werenaked-just body paint, nothing else. Aparently, the work (bodypainting) is very skillful-it looks like clothing. Has anybody ever been painted in this way? Is the paint safe? Is it waterproof?
Seems like a good alternative to swimsuits for the ladies!