While sanding the rear roof panels, another decal turned up, one on each side: Shell. A search of the web reveals that this rather ornate version of the famous Shell logo was indeed in use in the late 50's and early 60's.
Same style as the decals on the Land Rover, although the Rover's also has a square striped background.
...And if you were driving in Ontario in 1960, you may have had a map with a cover like this!
The capping stripped, and seals and 'catflap' support brackets removed:
Top panel masked and painted. In hindsight, of course, should have sanded "Goldenrod" completely off, but as the surface was completely flat and I assumed it was the same kind of paint as the gold.... But not a big problem, it's barely visible and it's an easy panel to repaint at some point in the future. The first priority, obviously, is to have a working Land Rover, and the rest can come later.
And finally, in the cold light of a snowy -9 C Winter morning, the completed roof paint, after drying in the warm overnight.