Forgot The Name Of This Coin Conserving Product I Bought Over 30 Years Ago.

Well that certainly did make a noticeable difference.

OK ~ Thanks to all who read this thread and participated.

There were a couple times I thought this wasn't even the same coin but I can see a small > shaped scratch on both the before and after images above the cornucopia and below the flag on the reverse.

It is dry as a bone this morning and here is the final result. Pretty interesting and I am happy with it.
Although this is appearing black in color, it still has a bit of brown to it but my camera doesn't show it.
It looks very much the same color as when I started, so there is no color alteration that I can detect.

This was not a thread about an 1850 Upper Canada Half Penny but rather the unknown stuff in the bottle and how it seems to work on a coin with issues like this one had and the PVC sticky junk on those Lincoln wheaties.

Before


After