Tristan Gale, depends on how far do you want to go with it. You can always remove the upper case [guide|2185] and then use #1000 grit wet sandpaper and start sanding the case. This of course means that everything else is removed! Then go to a 1500 or 2000 grit sandpaper and sand the whole surface for a couple of minutes more. Dry with a soft towel and you can then use plastic polish to buff. Or you can just skin it out or replace the complete case.