Also...check into the actual price of conservation...
A soak in pure acetone may remove some of the gunk from the areas around the details and acetone cannot chemically interact with the metal. So it is safe.
I wish I had kept the reference, but on one coin forum a guy said he was a former conservationist for one of the grading companies. He said they use warmed up acetone. But take that as anecdotal.
However, I have used acetone on hundreds of coins with pleasing results.
A soak in pure acetone may remove some of the gunk from the areas around the details and acetone cannot chemically interact with the metal. So it is safe.
I wish I had kept the reference, but on one coin forum a guy said he was a former conservationist for one of the grading companies. He said they use warmed up acetone. But take that as anecdotal.
However, I have used acetone on hundreds of coins with pleasing results.
How much squash could a Sasquatch squash if a Sasquatch would squash squash?
Download and read: Grading the graders
Costly TPG ineptitude and No FG Kennedy halves
https://ln5.sync.com/dl/7ca91bdd0/w...i3b-rbj9fir2
Download and read: Grading the graders
Costly TPG ineptitude and No FG Kennedy halves
https://ln5.sync.com/dl/7ca91bdd0/w...i3b-rbj9fir2