The finish is mirror. The camera does not take pictures well of the finish. But I did with and without a flash.
Doesn't look like a proof to me (though I'm not 100% sure). I'd say UNC, but heavily fingerprinted. Too bad, really, as the underlying luster is nice.
Here is a Cameo Proof 1964 Kennedy Half Dollar. Here is a "regular one" without the cameo. It is still in the Proof coin mint package.
Hopefully, the OP didn't apply the fingerprint - do TPGs do fingerprint IDs or is that best left to the FBI?
I think the finish is finger print, and acetone won't touch it if it's been there for any length of time.