We've just had a new bathroom fitted but noticed a few annoying scratches on the polymarble top, central on top at the front of the basin. Plumber has tried 'Bar Keepers Friend' to remove it but it's unfortunately taken the gloss/shine off the area and we're left with just a dullness where the scratch was. Can anyone recommend a compound that will bring back the glossy shine again on polymarble so we don't have to resort to replacing the brand new basin.