Barkeeper's Friend, this works great. I wet the cymbal down good with warm water, then sprinkle the powder on the cymbal. Take a wet rag and kind of make a sauce with it (enough water) smear it all over the cymbal, wait about 3 minutes and rinse real good with cold water, then dry with some soft towels. "IT IS LIKE MAGIC" I found it at Wallmart. I would try this before you do the acid.
Use the same thing. No scrubbing, scratching, just nice clean cymbals, the way I like them. This stuff is the best!! Most grocery stores carry it too. I can do my set of K's 22, 18, 16, 12, 13HHs in about 1/2 hour. Plenty of time to get to the club, set up, have a pint and still have nice shiny cymbals. Sound exactly as when I purchased them, which is the way I like 'em!