Sansa nicks

I have a couple nicks in the frame of an sansa fuze+ and zip. I have some scratches on the fuze+. I accidently used a 220 grit. Then I tried a 3000 grit to rectify that mistake. Im looking for solutions that can be obtained locally. 

No need for all the multiple posts asking the same thing. Additionally, you posted this same question 6 months ago. Did you read the replies and the links given? They are just as valid and pertinent as they were then.

No need to repeat.