I just freaked myself out. I used peroxide on my finger, and when I looked at my hand a few minutes later, the skin was discolored, like it bleached my tan away. I tested it out, with a big circle on the back of my hand. It bleached too, telling me it was the peroxide. Eek, my hand looks like a lava lamp . . .
. . . but it faded, the only discoloration is the test spot, which I'm sure will fade in a few minutes too. Sigh of relief.
But it gives me a good idea of a prank to play on someone, kind of like dissappearing ink, but in reverse. Evil chuckle