Polishing a grab bar...

I never used any sandpaper on my grab bar, I just grabbed the mother's and started polishing
 
yep, if you wanna use some sandpaper on it, I'd use some 400-600 just to do the inside of the corners. Thats where the aluminum is usually the roughest since thats where its bent at.
 
use a clean rag to put it on, rub it in a circuler motion and then use a different clean rag to whipe it off. Do small area's at a time. Don't try to do the whole thing at once. I usually do the same area 2-4 times or until I think it looks good enough
 
never used mothers for polishing i assume it can be done. if you have a dremel or a drill od some sort. get some cleaning rouge(brown and high gloss rouge(green or white) and with a polishing pad hooked up to your drill put the roughe on the pad and buff away. you will get a mirror like polish finish. stuff is cheap. rouge is like 4 buck at lowes and the pad is like a buck or 2. start by sanding it down with some high grit sand paper the start polishing with the rouge and it will look good. if i can when i get off today i will post up some pics of one of my shee motor mounts i just finished.
 
not trying to thread jack but what about an axle do you have to sand it than polish or just polish?
 
since the axle is steel, you'd be better off getting it chromed. You can sand and polish it but it'll end up rusting
 
i was told that there is clear coat out there that you can put on steel to help keep the polish and save it from rust. i havent looked for it yet but i will be soon.