OK, so I'm riding around and everything is going great. I park the bike in my garage to go in and have lunch. As I get off the bike I cringe in horror...I see what looks like a mini side swipe scratch on my upper pipe. It's small, and I guess it's something which got kicked up from the road. I tried cleaning it with Tar Remover first...nothing. It really feels like it's scratched...can anyone suggest something I can use to smooth this back out, without harming my chrome pipes?