big up to bstard child for his diy guide, spot on 
Bit of background first - Having seen some gti's on line and a couple where I work I soon realised my alloys were in real bad condition
I dunno what the previous owner did but I think it was a botched attempt at a refurb and then paint to hide the sin's. there was no laquer on the rims (??) and some bad corrosion around the studs which caused the very last 2 studs on the last wheel to shear 
got them drilled eventually at a mates garage and finally split 
After polishing the rims they didnt seem to shine as much as on bstard childs diy guide, i think this is down to not sanding in both directions, still a million times better than before though!
Unfortunately i was too enthusiastic and didnt take any before shots but here are a few during progress....
rims after nitromors (kerbing took some sanding!!)
after sanding to 2000 grit wet
polishing
polished & unpolished
both polished
centres before the wheel specialist
after the wheel specialist
reunited!!!
before and after ps. this is a spare i bought, way way better condition than mine were
I have my other 2 centres currently at the wheel specialist and need to get cracking on the last 2 rims but the weather just now is against me, cant wait to get some new tyres and get them on the car, crappy fox alloys dont do much for her!
