I've held on to my first bass mainly because it was my first but I never play it and I'm thinking its time to let her go. However there's one problem. The guy I had bought it from had also learned on this bass and he had written in the notes on the frets with a black sharpie marker. It never bothered me before because you can't really see it from 3 ft away but I'd prefer not to try to sell it like this because aside from the sharpie, its in near perfect condition. Any advice on how to get the sharpie off?