Last images from El Mirage.
In the first, you see the dust collected at the trailing edge of the trunk lid, where a line marks a curve downward (dust collected there fairly consistently), dust collected on the ledge just below the license plate, and lots of dust on the top of the bumper cover (but not at the ends of the cover).
In this second image, dust has collected on the aft side of the opening for the driver side door. It is smashed into the sheet metal and the trim, but not on the forward edge (on the door itself).