Had my rear quarter rust removed and resprayed at:
So Cool Customs Garage (also called Old Skool Kustom Paintwerx)
Unit 5, 63 Paramount Drive, Wangara 6065
Ross Houchen: 93026991
They don't take EFTPOS and I forgot how much I paid (was $300-400 I think) but the work was pretty good, I can't fault them.