The Allsop Scratch Defender can undo some of the damage you've exposed your iPod. Clean up the scratches. Lessen the gauges. The three-step process uses two separate polishing solutions (conveniently numbered in the order you should use them). Clean it, polish it, shine it up. The "trim to fit" screen protector will work on your iPod, Mini, Nano or iPhone.
Use some scissors and the dotted lines to cut the screen protector to the size you need. Then peel off the thin film and line up the protector with your screen.