I agree with Chuck on the buffing and probable hot salts blue. The easy tip-off on the buffing is the striations and the way the light reflects near the edges. I've seen some soft soldered hot blued doubles that never corroded and fell apart, but that's probably a function of how good the solder joints were to start with, and how well the caustic blue solution was rinsed and neutralized. Time will tell. But even under the best of circumstances, hot blueing old doubles is a no-no.
Hopefully your nephew got lucky and has a still sound shooter that was bought reasonably. There are many refinish jobs out there that are far worse than this, and there are many brand new guns that are not as good as a refinished L.C. Smith. It may whet his appetite to learn more and develop a lifelong interest in doubles. Although many will disagree, this is also a graphic lesson of the constant attrition and destruction of collectibility and value that results from hacking, honing, buffing, blueing, and amateur refinishing of an ever dwindling pool of quality classics.
