This was really helpful. I had some issues with a piece
of brass that was a mess, looked like cooked carrots and I used the
HP/Water and in about 3 min it was perfect.
Unfortunately, I then went to pickle a Sterling bracelet with hinges
brought given to me to polish that was a mess. I have no idea what
they did with it, but all the copper came to the top, and there was a
flaking on it, which made me think maybe it was plated copper, all
dusty and matte. It was in the new pickle for about 2 min, and when I
went to take it out, the pickle worked, but it came out in pieces. I
never had that happen before, so now I have to figure out what
happened, why and fix it.
This gal buys a lot of Mexican jewelry for resale in her B&M shop,
and I'm wondering if this is not really sterling and quite new and
plated. Most of the old pre-1950 Mexican jewelry I have worked on has
been amazing, well made, and this was really a shock.