What type of paints are best to use as an alternative to Body Paints (on human models)?

I once tried to use acrylic? or was it poster paint on my brothers arm as a fake tatoo. I also used watercolor on my clasmates faces back in highschool. I thinkIt would be safe, only if your models don't have any sensitive skin, or their bodies might be allergic to paint, consult this with them. I was thinking you might want to use glue as primary so the paint won't sink in their skin, using moisturizers underneath the glue I guess. About shaving them, I'm not sure, they might end up having those little pore bulges? sometimes it happens. Your models might blame the paint for it. Apply the paint as if it's applied on you. Just don't use oil based paint or paint that needs thinner to remove them, esp. on their faces, but since you mentioned it won't be applied on their faces. You said it would only be on them for 2 hrs, so I gues it'd be ok. :) good luck with you're project :) actually you just gave me an idea on my project :D