BadThad's creation is the only appropriate solution for a numismatist facing verdigris on a coin. I believe this coin must be treated as a PVC byproduct infestation first; it looks more like PVC than verdigris and PVC is the more pressing possible problem.
Get this coin into acetone, stat. Take the one day it'll involve to research this forum for the appropriate use of acetone; we discuss it frequently here and I (among others) have expended significant verbiage concerning the safe usage of it. Acetone is a substance which is only safe for usage by an informed user; the casual practitioner stands a good chance of both wrecking his lungs and burning the entire neighborhood down. Don't be that guy.
Get this coin into acetone, stat. Take the one day it'll involve to research this forum for the appropriate use of acetone; we discuss it frequently here and I (among others) have expended significant verbiage concerning the safe usage of it. Acetone is a substance which is only safe for usage by an informed user; the casual practitioner stands a good chance of both wrecking his lungs and burning the entire neighborhood down. Don't be that guy.




















