In Reply to: ACID TEST posted by Tim Daley(MI) on August 16, 2017 at 08:33:34:
The acid will eat the zinc.
I made the mistake of mixing in one stupid token in with some coins I was cleaning. The crap they use to make the token out of stained all the other coins. It was almost like plating process. Couldn't get it off the other coins. I also had a jar of pennies in the soak too long and the zinc from one that I had mixed in with all the other older pennies suddenly turned all of them black. Lesson learned...don't mix metals when using a soak like vinegar.