How to polish aluminium - a great guide
- 
Found this in the depths of my phone while trying to find some old picture it’s a great guide so I thought I would share. have been polishing 
 aluminum on motorcycles
 for about fifteen years now.
 All of my polishing has been
 by hand with no air tools. A
 bench grinder with a buffing
 wheel attached helps. I
 have a 98 gsx-r 750 and
 just recently polished the
 outside edges of my rims.
 My '90 750 was completely
 polished, wheels, frame,
 triple clamps, handlebars,
 swingarm……everything that
 was aluminum. It looked
 great!
 Polishing the entire wheel is
 very tedious because you
 first have to sand the
 casting down on the wheels
 so that they are smooth, but
 leaving the cast spokes
 painted and polishing the
 edges is quite easy
 because when the rims are
 cut it smoothes out the
 casting on the inside and
 outer edges of the wheel.First mask off any part of 
 the wheel you don't want
 stripped, if any. Then get an
 industrial grade stripper, I
 recommend a spray on
 stripper called Tal-Strip linkedover and leave for about 20 
 minutes. After that time
 check for bubbling and peeling. Use steel wool
 and wipe off paint, re-apply if necessary. Rinse
 with water. Once you have removed the paint
 from both sides it's time to sand them glass
 smooth.
 Start with 320 grit till the rim seems smooth. Then repeat the process with 400, 600,
 800. 1000. and mirror fine sandpaper till they are
 smooth as possible. Once you are sure that
 there are no deep scratches and the rim is
 smooth as glass then you are ready to polish.
 The sanding should be wet-sanding with plenty of waterNow get some Mother's Mag & Aluminum 
 Polish linked by editor to product info at Amazon and start
 polishing with a fine 100% cotton cloth. Buff
 each side of rim about 5-6 times wiping clean
 with a separate cloth each time. Once desired
 shine is achieved remount wheels. You must
 remember that once they are polished scratches
 show easily. Finish by applying a coat of
 automobile wax, I use Meguiar's. Some people
 will tell you to have them painted with clear coat
 but the paint will peel in time as the aluminum is
 too smooth to hold the paint effectively. You will
 only need to re-buff once every month or so. I
 would go over my aluminum real quickly with
 polish after each wash. If you keep it waxed it
 will not oxidize, don't believe people who say it
 will oxidize, just keep it waxed and give it a quick
 I polish every now and then. You'll get the hang of it