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This forum is sometimes the best Envy Management Course available. It should be on the NHS.

Particularly if the acetone has removed any protective grease/oil traces, so the air can now do it's work....

I’ve got the NHS to thank for all my pennies...........🤩 Jerry

It looks EF or perhaps a tad better. For a coin to be described as "about uncirculated" you really want traces of lustre or at least subdued mint gloss, and really only the most trivial of wear. Regarding the surfaces, they look similar to some 19th century French bronze pieces I have after cleaning with acetone for PVC residue; slightly buffed, but without any real damage associated with the cleaning. You'd have to be pretty fussy to treat it as a problem coin, but whether it affects value depends on how it appears in hand. The effect will probably lessen over the years if it's left alone.

"Shilling" a Crown for dollars

Acetone wouldn't alter the surface, other than to remove oils and grease. Maybe a harsh lighting effect, or a slight rub in the past. Jerry

No, it's not mentioned in Mick Martin's article (actually July 2009 SNC) so could be a discovery coin. As Iannich48 says, neither of these dies was used for restriking and I presume it has an engrailed edge.