Don't waste your money on GS-27, it's not going to help you. Try something like Mequiar's thinner (#1) and Polish (#2). If that doesn't help, you'll need professional help (bodyshop, maybe a BMW dealership). I mean like, were you parked in a shopping mall, bad neighborhood, or what? There's that GS-27 stuff I see on infomercials, you could try that. Otherwise there are some polishes that come with lipstick type things that might help, but I think they only come in certain colors.