This is the 2020 £2 silver proof Mayflower. There is a noticeable smudge at the 8:00 position. Also around the ring where the two metals meet. I have some acetone. Should I follow the typical dipping procedure or use a q-tip w/acetone and try to just get it wet, then wash clean?
I would never use a q-tip on a proof. A bath in acetone can't hurt. After that a quick dip if needed.
I was able to remove the "smudge" with a standard acetone bath and rinse. The residue around the ring didn't change and may be a result of manufacturing.
As predicted. I have posted and you may want to consider what I have said. This is an oxidation that I believe is related to exude from the bonded inner ring surface (this can be simply cleaning agents from the interface and not adhesives per se). But, your coin....
