Those are unusually strong colors and certainly not redone or the bottom would be more like the top. I'll go along with the barbed wire or hanging nail theories and suggest maybe also a lot of leaning over the edge of a duck boat. Most guys around these parts abused the buttplates in pushing down barbed wire, and I personally go out of my way to avoid the barbs. Topgun is absolutely correct about not forcing the forend on an uncocked gun. It's not hard to remove it in that state but can and will be damaged while forcing back on. Brophys' L. C. Smith Shotguns shows a simple tool that can be used to manually cock an uncocked Smith. I don't know if anybody makes one, but it was fairly easy for me to make one from the pictures in the book. I last used mine in January after I bought a field grade FW from a guy struggling to get his forend back on.
