I have bought two of these recently--one a Bust Half that otherwise looks fully BU, and a Seated dime, that also looks BU. Subsequently, more experienced eyes identified them as "whizzed". On the dime, NGC called it "AU details" even though it has BU qualities. The question here is how is whizzing usually done, who are the idiots that do it, and are there good ways to identify it?
Thanks. In order of coin damage I suppose it is up there with "tooled". I had PCGS call a gold coin that, but NGC called it cleaned. So you cannot fool any of the TPGs who will not give a numerical grade to problem coins these days. They keep on biting the owners who may buy them as good coins.