We picked up some ex-display bathroom gear for our new bathroom. It appears to be a billy-bargain but the basin has some black "scuffs" around the tap, apparently from a tool that has rubbed against the surface whilst it was being fitted in the showroom. It's not a scratch, or at least not deep, because I can't feel anything when I run my nail over it. It's not bad, but I know it's there!
I've tried all sorts - WD40, Brasso, toothpaste, but nothing seems to shift it. Any ideas as to how I might be able to shift it? Thanks.