This evening I sprayed some black paint onto those areas of the frame that might be seen by the outside world. Black is a good neutral "color" for making things disappear into the dark background.
The LDP area and utility arm areas are candidates for viewing.
I turned the frame upside down and sprayed the bottom side of these ribs. The bottom plate of the frame itself will eventually be painted white around the skirt area.
I also painted the areas behind the octagon ports, as these have slits in them that can be seen through.