Handed-down tip that might help out someone - we were advised to bring with us a Rub-A-Dub Sharpie marker instead of the regular black ones. The people who used it said that they marked their **** one time with it and it never faded after being washed. I have no personal experience with this, but I was told by candidates who have already been, that it helped out a lot, so I figured I'd share. They said it was a big time saver.