bright work
n.— «Hill’s job on this piece of aviation history was a tricky procedure called “bright work,” shining the naked aluminum on the underside of Air Force One’s fuselage. “We polished it. Then we put a coat of wax on the top of the plane to protect it from the elements,” he said.» —“Auto detailer has chance to spruce up Air Force One” by Tony Baughman Aiken Standard (South Carolina) Oct. 22, 2007. (source: Double-Tongued Dictionary)