Use acrylic paints, as they dry fast and usually stick' well to skin. DO Shave, as much as you can before, as getting the knurled up balls of paint out of your body hair is the hardest part of clean up. The paint flexes' well, with limited motion so wont' 'crack' or break up on body if you are waiting for pose, for a competition after being painted. Had my first experience about 10 years or so ago at local family nudist resort for the AANR week events going on.
We had a couple young ladies who were the main amateur painters. Everyone was nude, painted and those painting.. Anybody who wanted to get painted just checked with them before deadline. I watched alot the first hour. Most just got a highlight item on shoulder, over breast, on back as 'tramp stamp' etc. Nobody spent time for a 100% body covering paint job I got an idea for a tree, that would go up one leg and branch out full, over my chest. The girls liked the idea. One stood and worked on my chest area with leaves, branches and such. The other worked from my one leg to create a trunk and they worked up to meet somewhere. Due to the amount of paint and time it took to get done, we had a bit of a viewers gallery sticking around to watch
As they neared completion, I asked the 'lower half' artist if she was going to paint my penis at all, like as a very short, stubby branch on the tree. "Sure, why not?", she said. She was all for it. I gotta say it was pretty dam interesting to be standing there naked in public among family nudists and to have her just grab my small cock, yank it a bit to stretch out the folded skin, and hold it upright in one hand as she started to slather on the paint colors on the under side of my dock, then she carefully held it out to dry before letting it hang down.
Next was paint being brushed along the front and sides of my dick until she was at the cockhead, where she changes up on the color a bit, and the brush stroke method too. Really. ! And i got to admit she did a fine job, and probably was done with it in less than 2 minutes. Held it out to dry again.. As she moved back to the waistline where paint flex was showing, I noticed that my soft shaft began to grow' somewhat from all the handling,, and now was up to near its maximum soft' hanging condition. So this meant the dried paint cracked, and the amount of my 'growth' was obvious due to the exposed unpainted skin now visible. I didn't call it to her attention, but since she was working at eyeball level with my dick,,she noticed soon and just looked up, gave me a look that I'm not sure what it meant to say ,,but she just grabbed my dick and went back to repaint it again. Glad i did not give her anywhere near a horizontal branch' to finish up...as I'd surely been kicked out of the family resort for that. But a fun day, nice paint job and even though cameras are not allowed at resort, they did allow for a few moments to get personal pics of the paint job, and the official pics for the contest.
I gladly came back the next season on that week with a new idea for a new paint job. And have done my own glow in the dark body paints for Halloween on myself since then, but that first time was quite the experience. Have been to nude event where we are all nude and painting on canvas a nude model, but never a nude painting on another nude body event.
That could be fun too. Toughest part is standing around, can't sit or it folds' up the paint at your waistline, and the showering it off is tough if you have lots of body hair to hold the paint . Had paint inside of my clothes for days after that.