Most of the obverse busts for the "FELICITAS AVG" type are lean, not so heavy set like this. The below example of a "CONCORD MILIT" type has that obverse style. http://wildwinds.com/coins/ric/florian/t.html
So quite a good coin, I do not think there is really anything worth cleaning off. The reverse seems to have been struck using an worn Die.
If you wanted to use a Wax, it would at least bring out the look of the obverse better.
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