[1] Added a much-smoother 'fillet' of regular filler over the earlier waterproof filler, where the upper half-doors meet underside of drip rail.
[2] Built up regular filler around the perimeter of the spare tire well... hopefully, I can sand this down into a fairly smooth radius now.
[3] Decided that if I was going to be spraying primer, it would be a good time to remove the outer handles on the back doors. Got screws removed, with a little fiddling around, but so far can't get handle shafts to slide out of latch assemblies, on either door. Took latches loose, so I had room to spray penetrant along the square shafts, and left them for now. May try torch heat on shafts tonight or tomorrow to help break rust bond.........
Hopefully by the weekend, I'll have gotten things sanded smooth, and primered much of top and front.