The field in front of face looks cleaned but it's hard to say for sure from the pics. What is that third pic?
Oh, I see now. It's a close up. Since it's round, I thought it was a coin or something. Sorry. It's hard to tell from that. Abrasive cleaning with a cotton towel or something might impart evidence like that too, not just whizzing. What I'd suggest is take some copper cents and zinc cents, clean them up to different degrees (vary the intensity), and then study them in comparison to an original coin
I see fine directional lines in front of the face and some other areas that would leave me to believe it had been cleaned. Not 100% sure though, lighting can highlight lines and hide others.
This one belonged to Lehigh, but I have to steal the image because like he said, it is the poster child of whizzing. Here is one I commented on a while back: In the 2nd text box I should have said the even, all over shadow effects are because the wire bristles (or whatever they use) couldn't get into the recessed parts. These are both pretty extreme cases, but I'd say your Peace Dollar is just a circulated example that was probably cleaned.