This will probably date me, but back in 1967 I worked as a summer student working at an airfield outside Belleville, Ontario dismantling old F-86 Golden Hawks. There were definitely NO guns in those bays. For a flight demonstration aircraft, they would have added a lot of extra weight. Interestingly, the gunsight radar was still there (with accompanying black box in the cockpit), but the cartridge magazines and all related equipment was removed. (In fact, the gun mounts were still there, and we ruined some power bars and sockets getting those mounts off - they were really torqued on.). I do remember that the gold was not really brilliant (upnorth's solution sounds about right). At the time these were flying, the bare aluminum was kept pretty shiny, but, by the time we got to them it had that grayish patina of oxidized aluminum. Kind of a sad end to some pretty striking aircraft. As for oil lines, it was simply a pipe (about 3/4") which ran down the side of the fuselage and vented into the exhaust. I don't know how it was hooked to the oil tanks you speak of - they had been removed prior to our srapping the aircraft.