Thanks for the tip. You think it will remove those spots from the coin? Does acetone react with verdigris because it only shows after applying acetone. From what I've read acetone should not react with verdigris.
As far as I know verdigris does not cause damage on itself? Or am I mistaken?
ps. tried to remove the residue inside the reeds (wont try it on the coin surface) and works very well with a tooth pick so I think it's something else than verdigris?
Edited by jagoedo
05/17/2018 1:51 pm