Hard to tell how 'well' this cleaning did. The before and after shots were taken in different settings - resting on different surfaces and with different lighting. The `after` pics seem kind of favourably presented.
And now it occurs to me that we will never have new `before` pics.. haha it must be Friday afternoon.
I forgot to take before photos so those were just screen grabs from the auction site. I am afraid I can't duplicate them. Here are a couple more where I was a little more careful about the lighting. The 1963 is pretty much clear of the thick hard green. The original lustre is still there and has not been replaced with a "cleaned coin" polish lustre.
The 1959 is still obviously quite compromised. But most of the hard green is gone and the legends are now legible.