i know I am not supposed to clean coins but... I found this while coin roll hunting and it appears to be in great condition. The only problem is there is black gunk all over it. How do I get it off without damaging the coin? Or should I leave it alone?
vinegar soak and pat dry is all I have tried, and only on my buffalo non dated nickel for carving. I would have NGC do it if you had a set going out to them.
Nice find and I agree with pure acetone, no vinegar. Just be very careful with Acetone and use in a well ventilated area away from any flame or sparks.