Sorry meant to say above, have found the G27 stuff pretty good. It's in a tube, think turtlewax/TCut do something similar and is quite aggressive. If the scratch isn't too deep then this will help clean out any rubbish and make it look a lot better. Will also smooth off any rough edges to the scratch and make it less noticeable, just rub along the scratch with it, and you don't need much at all.