The Novus products work well, but they will not remove deep scratches. I've found that if you run your nail over the scratch and you catch the groove, then you'll probably have to use sandpaper. I'm sure buffing with Novus will eventually get down to the depth of the scratch, but it would take you a REALLY long time. I would recommend buying a kit: https://www.micro-surface.com/default.cfm?page_id=175#28. MA-1 ACRYLIC RESTORAL KIT should do the trick. Get ready to put in some work though. You have to be patient and put in the time, but the results are worth it.