i have some rims that got scraped up in my accident. im gonna repaint them but they are powdercoated already. What kind of sandpaper should i use if im gonna sand them???

 

Just get em powdercoated...its not too expensive, and sometimes flaws can be hidden easily.

 

Depending on what kind of "scrapes" there are, you probably can't sand em unless they were small scratches. You would need to blast them to get rid of the curb marks. The place where I went to powdercoat my wheels did that for free