D.A.
Have you tried Mr. Clean's Magic Eraser? It may not work, but it is certainly worth a try. I have found from personal experience that those little sponges are WONDERFUL!!! They will remove stains that Clorox Bleach or any other powerful household cleaner won't touch and they seem to be pretty safe, no chemicals that I know of. It's still a mystery to me how they actually work because there are no cleaners involved. Just wet the sponge and wipe. Another idea might be a product called "Goo Be Gone" usually found in the automotive section. It supposedly removes paint and sticky residue. Hope this helps! Good Luck!