Rims on an 02 diamante
 

I have my original stock rims on my 02 Diamante. I live in Buffalo, NY and there is alot of salt during the winter time. Aluminium rims are oxidized and a tad pitted. Can I sand down the Aluminium, or is that a no-no. What is the best way to clean up the face of the rims? I checked out Youtube did not receive much help. Any advice would be helpfull.

Thanks,
Ryan