I bought a coin from
forum that I noticed
had BD when I was moving it. I treated it with sodium sesquicarbonate and DW for about 6 weeks in total. I am pretty certain I've beaten the BD. However, the chemical treatment changed the color of the coin's surface. Compare the listing photo:
https://www.forumancientcoins.com/Auction/APViewItem.asp?ID=74227 with the coin's condition when I removed it from it's bath (attached). In hand, the coin was very orange, which I liked - it
had a very different color to the rest of my
collection. I assume the orange in the pictures now is the bare metal due to the chemical agent. Is there anything I can expose the coin to in its local environment to re-introduce a very orange
patina? I am a young collector, so I'm not necessarily looking for something fast, this can be a fix that takes a few years.