Mate depending on how bad the wheels are it can take ages.
i did my BBS splitties and gave up after the first one, proceedure for old wheels is this
1. clean them with soap/water
2. clean em again with a dishbrush
3. clean em again with wheel cleaner (i used autoglym stuff)
4. get wet 800 and 1000 sand paper and begin sanding lightly, the idea is to remove the old lacqure, the oxidised layer and then take away the layer of metal around deep pits and scratches. you will need to spend about and hour a wheel at this stage and keep the paper wet, cleaning the wheel with wheel cleaner/saop water every 5-10mins. work away a bit extra around heavily scratched areas.
5. at this stage the aliminium will be scratched to hell from all the sanding, so now you need to begin polishing out the sandpaper scratches.
If you can find in UK 2000 grade paper this speeds up the process but not sure how available it is there. otherwise get a drill and a polishing head (it looks like a stiff cotton wheel about 6inch in diameter and get a small on about 2 inch in diameter. get some aluminium/metal polishing paste such as AUTOSOL. then begin polishing using the drill/polishing head and you will begin to smooth out the swirls and scratches you made with the sandpaper. keep cleaning the wheel with water regularily. again this stage takes 1-4 hours. note if you are going to use a dremmel be carfeful as they are a high speed polishing tool and can burn the aluminium, this can be as hard to polish out again as a scratch. time is the only solution by using a medium/ fast drill and polishing head. Keep appliying a good amount of paste and using the polishing wheel work the paste around the rim, dont stop in one place too long, rather do a six x six inch area then move on overlapping slightly.
6. now the aluminium should look much better, and maybe beginning to shine and bit. now take fine grade polishing paste (the kind you use on paintwork polishing) and some cotton wool. and continiue polishing the metal in a circular motion. again time is the key and this stage can take anywhere up to 6 hours for a mirror finish. get in front of the telly and polish away my son, and thank the lord you dont have stainless steel wheels! i polished a piece of stainless steel in the same manner for my boats dashboard, it took me three days of four to five hours a day, but finish was mirror like!!
TIP... do each stage to all four wheels at a time...i.e do the first snadpaper stage to all the wheels, then polish all the wheels, then finish all the wheels other wise as your soul becomes destoyed when you realise howlong it takes you will rush the second and third wheel and your forth wheel will look turd
Trust me it will come up real nice if you take your time, but your hands and arms will ache and it will pi55 you right off!!
heres one i did earlier (but gave up and sent to a professional, for the price its worth it!!)
as i got em, scratched, dirty, brake dust etc etc the closer one is cleaned with autoglym cleaner only.
a bit more cleaning and some polishing
gave up after five hours and went to a pro..
mrlee