I bought an AL toolbox and some AL diamond plate bed rails for the new Dodge. I plan on color matching them when I paint the bumpers the mirrors.

Question?
What do I need to do to paint the new shinny Aluminum stuff?
They are sprayed with some type of clear coat...

Option 1 - rough them up a little with some scotch bright / sandpaper, paint.
Option 2 - sandblast, prime, paint.

I think that blasting them can lead to other problems so I would like to avoid it if possible - can I?