I quite like the bangs and scratches on mine. It's an old Coventry Eagle frame built up a bit like a Rivendell - Brooks saddle and situp and beg bars, and I think it suits a few nicks. Best thing is, I remember where I got most of them. I have a scrape down the toptube I got recently when I tried to lean my bike up agaist a bench after crossing the Rhine into Switzerland over a 15th century covered bridge. It was a beautiful evening, and it seems a shame to get rid of that.