Mr.Lud, You didn`t need a hundred posts to answer if they were A`s or K`s,....yours clearly say Avedis Zildjian on them !! Second,..more in case,...after you clean them and decide that`s what you like,...How will you stop the bronze from oxidizeing again ?? You can`t without adding something that will ruin the sound !! Those polished cymbals you seen in the photo wont stay that way very long and your dark brown ugly fingerprints will show up the next day. The patina on the cymbals actually wont let your fingerprints turn dark brown, it protects the cymbal from further oxidation.
As I had said in one post, one of the best ways to artificially age a cymbal is to actually polish it!!! That's right- get rid of the coating of lacquer and slight patina. I old K's looked quite brown about two months after I polished off my finger prints!!! Keeping them shiny is too much work for this old guy. I hate to think what they look like now. Okay- they actually probably look pretty cool...
'scuse me while I go pee on my ddrum shade cymbal :p