Boy, it's obviously been a long time since I've followed the conversations here!
I've been using some polishing wheels on a bench grinder -- not polishing really, but it leave a nice clean surface. Worked a lot lately on some nice Ludwif hi hats.
But if you DO get ambitious, those Slingerland Tempo Kings look AWESOME when they're polished. I have a soft spot for those... I think I had mine done by a pro-polishing shop when I was using that shop on a semi-regular basis...
Plan B? Dawn detergent and baking soda. Use a brush with pretty stiff plastic bristles. You can experiment with some metal/wire brushes, but check to see if they'll scratch. Baking soda is the absolute magic ingredient for so much clean up stuff for me...including soaking up spilled beverage from the carpet.
I've used the aluminum cleaner goop from the hardware store... nope... not worth it.