Nice improvement! If you really want to go for it, work your way up to 1200 and then get out the Mother's. Of course then you'll worry about them more too.
You could probably recoat them with a clear finish and have it last longer. I looked into this for a set of 'Vette wheels I did for my Camaro but if you get them smoother that what you have, the finish doesn't stick. As I recall, the proceedure is a bit complex so if you consider it, dig into the details so it lasts.