These 2″ x 72″ film polishing belts, similar to micron graded film belts, are a good tool for sharpening and polishing.
 
Special-treated AO grain, top-coated with a grinding lube
Belt backing lined with Velcro, creating a cushion when using
Made with 100% polyester film
Sold In Packs of 5 or 10 belt packs
Special Treated AO Grain
Backed With Velcro
Available in grit P220, 320, 400, 600, 800, 1000, 1200, 1500, 2000