OK, standard disclaimer: I have about four weeks worth of knowledge.
Putting iron in the pickle should cause any copper ions in solution
to precipitate, giving whatever is in the pickle a copper plating.
I’m not sure if you really want copper plating on your stuff, though
it would redden the gold.
Also, if the pickle is fresh, there won’t be any copper in it to
However, I may have missed the mark with this because, again, I have