hello, quick question, what kind of marks are these on cymbals? I have owned many B8 cymbals, Paiste PST7, PST8, 900, B8X, but after buying some zildjian As they have some ‘stains’ on them. What type are they and can they be removed? If not then it’s fine, just I don’t like the look of them. It’s only on the hi hat (so far).