Bjorn, I looked up your quote from May 2009 which was in reference to markig queens. "I want to take this product and paint a 18 inch disk on your back. If we have families participate, we can have family members paint their backs with different colors. White, Blue, Green, Yellow, and Red, seems like great colors. But once marked, you will carry the spot for the rest of your life. So pick a good one."
I think you are a little late with this experiment. Apparently tattoos have not made it out to your neck of the woods in PA, and out here in Phila there are plenty of people who did not pick a good one.