In my mind a felt wheel or rotary brush is harshly mechanically cleaned. I also associate the rotary brush with whizzing & wondered if that was what nohope thought was the case with this coin. I normally think of wire brush marks on the coin when I hear harshly cleaned. I definitely wasn't seeing that here, but the surfaces of the field looked artificial to me. I can't tell if thats the picture, if someone used a dremel tool on them, or if someone used another method to smooth the surfaces.



















