Yes, several of times, 5, IIRC. Typically they are maintained by trained armorers, carried a lot,
shot a little. In the old wooden grip revolver days, the grips usually were pretty battered
from banging into stuff, and they tend to show holster wear but be mint inside. An Israeli
FN HP Mk 3 was pretty rough on the outside, painted finish had suffered a lot, a few spots
of shallow rust, but absolutely functional, complete. It was by far the most "beat" one
I have seen, probably military, not police.
A S&W M&P 45 police trading that I recently bought was so close to mint that it was amazing.
The exterior finish nowdays on many guns is not bluing, it is Melonite or a variation of salt
bath hard nitriding, which blackens and makes the exterior extremely hard and wear
resistant. If you hold the slide just right, there is a slight difference in the sheen on
an area on the top of the slide. That is it. Otherwise mint. Plastic stands up very
well.
Bill