how do you remove scratches on a 2DS?

there are light scratches on the the back of my 2DS how can i remove?

though it applies to 3DS too,but wouldn't care less,it's just a scratch,no big deal,unless it's a crack,now that's something,you should be careful rubbing off the grease next time,things like these are not made of stainless steel,that's why it's important to apply some armor,translucent if possible,it'll make a 2DS look weighted and bulky,but it will protect the back side from scratches.