Pretty much everyone has advised you on what i was going to say. But with all the stuff we've polished here we found its a progressive thing, start with something rougher and work your way to something more fine. We start with a wet and dry sand paper as someone said to get that clear coat off, then depending on how bad the surface is we go with say autosol with steel wool, then autosol with a rag, Mothers have a great mag and aluminuim polish that we use next, then if its still needs a hit we throw a bit of that purple polish on there. Sounds like overkill but it doesnt really take that long once you get into it. Dad's polished up alot of the crappy looking alloy things such as his alternator and they've come up great. Someone mentioned a power drill attachment as well, we got a few attachements that we use in the die grinder to help get into the harder to reach places, like the holes in your rims.
I found that if i took them off the car one at a time and when i was sitting in front of the television i'd just start polishing, makes the process that bit less boring and your in luck, bathurst is on weekend after next.
If you do it properly the first time its alot easier to maintain the shineyness later on.
Gotta love the look of a tonner with shiney rims, the centrelines look tough as. Had them on mine for a while but didnt have the width i wanted under the arse :y: and IMHO the standard WB front is probably the ugliest one to ever be seen on a holden, not a fan but your tonner looks tidy none the less. Sorry to go off subject.