Quote Originally Posted by bill3152 View Post
I would start at 600 and up to avoid too many scratches that will show up when your buffing.
Agreed. Recommend wet sanding as well. Start at 600 and put in a good hour getting the rust off. If you find that the 600 is not getting the job done you may nedd to drop down to 400 grit. Here is a wealth of information Hand Sanding a Razor

Best of luck, let us see a pic of how it turns out.

Matt