Use quickleen stainless cleaner. We sell it at 30 bux per kg. Non corrosive, lasts for ages, not very messy. Acts like a cut and polish. I'll bring some on the next meet.
Cleaned up the exhaust on the r32 well.
On another note, my mate vacuum sealed my money hahaha. (he's a butcher, dropped the car to his bro and went to get teh $)
Took ages to open