I used to run a performing group—our guys were asked to perform under blacklight with day-glo liquid latex.
The organization that hired my group did not tell the guys to shave first. It became extremely painful to remove- like running a dry balloon across body hair, one follicle at a time. Also, they didn’t give the guys the lotion to put on over the latex after it dried, so the latex between their arms and ribs got completely stuck together. These big, strong guys screamed when they raised their arms, then got huge hickey-like marks and slightly bleeding abrasions from pulling their arms off their ribs. It was horrible, and we were really tiffed when we realized there was a “right way” to paint bodies with latex and nobody bothered to tell us.
It took them 3 days to peel it off. For the hairiest guy, I finally figured out that nail polish remover was the fastest and most painless way to remove it off his body hair.
So, if you gotta do it, do it right. Do your homework to minimize pain (unless pain’s what you’re aiming for). I’m sure there’s fun to be had, but not for my poor actors!