I have painted the back of my draw hand before. I have since just learned to practice with gloves on. My favorite are the camoskinz from cabelas. I bet I look funny during the summer shooting in shorts, a T and gloves.
A funny story, long time ago, in an early season hunt, i dropped my hunting coat from my stand once I got up there. It was hot and I didn't want to take the time to climb back down(climber) so I painted up my entire arms from the tshirt sleeve down to my wrists. [8D]