I now have testimony.
Thanks again Richard! "Bar Keeper's Friends" ($1.67 from Target) really does let the paint rub off on your finger. I tried using a rag first, but that took forever. You almost have to apply direct finger. The stuff is pretty gentle on the hands, though. It made a hangnail burn, but after a washing, my skin wasn't dry, tender, or anything.
I think it is some sort of baking soda mix, so it is less harsh than comet or anything like what I expected.
-Tim