Just yesterday I was looking around here for some info on detailing a bike to help out a friend. He stopped by yesterday and asked me what he could use to get his chrome exhaust pipes clean. The rubber on the bottom of his boots will rub on the hot pipes and melt on there. We tried a few cleaners and nothing would touch it, but I found a couple websites where people used SOS pads to clean that and rust off chrome. The idea terrified me, but it seems like a lot of bikers use it and they all said just rub gently, straight back & forth lines, and if it does scratch you can polish them out.
With his permission and promise not to hold it against me if it scratched, I gave it a try and that thick black rubber came right off. I just wet the SOS pad in hot water and used very light pressure and the pipes were spotless in a couple minutes. I couldn't find any scratches, so no need to polish. I put on some AIO to see if that would protect at all, but I assume that will melt off the next time he rides it. 303 looked great on the seat too, brought the black back.