The kinds of dings and scratches one normally acquires when hunting, et cetera. (To be distinguished from Levi rivet dings.
) For example, I have a 1932 Winchester 61 that is about 98% bluing and the stock has several small scuffs which the previous owner dabbed over lightly with oil to seal them. Otherwise, it's like new. That would constitute honest use. Or a gun that has clean metal but turned towards brown/thinned blue, a stock with a bit of use, and is, otherwise, mechanically very good to excellent.
This does not include guns that look like they've spent their days bumping around on the floor or bed of a dirty truck, sporting ten non-factory holes for scope mounts that were obsolete thirty years ago and "improved" with do-it-yourself gunsmithing and stock carvings. Of course, that's mostly for firearms, but you get the idea.
In other words, if the gun looks like it was used but well taken care of.