It will do a good job, but you've got to be careful not too go to far. sometimes stopping the green is better than removing it.
I have only used it on non-MS coins, and only with a Q-tip & toothpick.
The danger of ground soaked coins is corrosion (there is some present on yours) and removing the verdigris can result in exposing un-toned surfaces (see below)
If you intend to keep it, my advice (take it for what it's worth) would be:
24 hour soak in verdigone,
light Q-tip treatment to remove any "loose" crud,
toothpick to remove stubborn "chunks",
re-soak or re-coat the surfaces with verdigone, pat dry with a soft cloth or tissue.
The verdi treatment should lock any remaining verdigris and keep it from spreading.
If you intend to sell then I would leave it as-is, because any treatment can not be un-done and you run the risk of devaluing it substantially.
Again, amazing find
. These aren't totally impossible to find online/from a dealer, but you'll never dig up another one out of the ground!
Below: not mine, but a fair example of what sorts of ugly could be lurking underneath honest aging.