I know a few of you have done it. I don’t plan repainting the covers but thought, while they are off, I would try to clean the ribs. I cleaned and degreased the covers. The ribs have heavy, patchy dark stains on them. I tried steel wool, rubbing compound and sandpaper 150grit. There’s some improvement but not much. I didn’t want to use rougher sand paper as I thought it my scratch the aluminium / aluminum too severely.
So, what’s the best way to shine these ribs up a bit, please?