Now THAT's interesting. A low-gloss sheen to the paint may indicate worn and faded high-gloss black paint. I read that high-gloss black paint was frequently applied to B-29s in WWII and Korea, also on P-61s in WWII as a defense against searchlight beams. RAF Beaufighters and, I presume Mosquitos, also carried that scheme and for the same reason. It makes one wonder if this thing was used for some nocturnal purpose in Korea.