Y'know, I guess the acetone didn't do much of anything for the discolorations on this coin. I grabbed it hastily when I decided to clean the 1877 Seated Qtr. I just looked at the 'before' pics I took yesterday... no significant difference, that copper-colored stain was there before treatment and the black looks about the same throughout.
As for the toothpick, I gently poked at the black stuff, didn't do much on this coin as you can see.
(lighting conditions were different for yesterday's pic)

As for the toothpick, I gently poked at the black stuff, didn't do much on this coin as you can see.
(lighting conditions were different for yesterday's pic)























