Here is an IHC that I forgot I had and it seems to have some problems. First it looks like it has 2 strike throughs on the 4th and 5th Indian Feathers. These are holes that aren't corroded. There is plenty of blue/green patina crystals on both sides of the coin. The photos don't show it but the lowest diamond is visible. Should I soak it in acetone? Boil it in oil? (joke) or what? Bruce
Get a soft makeup brush from the wife, and some acetone. Soak it in Acetone for about 1 minute, then lightly brush the crud away. ( push the crud, dont brillo it) Use a rose thorn (still attached to the stem, easier to handle), and with a loupe, pick away at the hard to get areas. ( good for the edges and in between dentils and such micro areas) Dip a Q-tip in Blue Ribbon and then roll on the coin, lightly brush again, pat dry with a t-shirt shred/rag. It's a goner, but you can save it and make it look better. The coin is damaged, I would not worry too much about hurting it anymore than it already is. Your result will be a cleaned coin, but perhaps a better looking coin
Your problem is PVC damage. If that coin had an S on the reverse, I would not encourage any self preservation, but a trip to NCS.
