Cleaning aluminum slots

here is a pic of the back wheel i did. I hope it helps like i said they were terrible before i started. I also agree with toby sort of. I dont know what grit you would start with but if that is what he says he may know better like i said i didnt start that low but anyway i do agree with him if you keep going with finer and finer sandpaper they will look better and better it all depends on how much work you are willing to put in. I plan on taking mine back off and working on them some more this summer. Good Luck Justin