In the 2nd photo, it looks as though there's what's called an "open blend" in the sail panel (C-pillar). It may be possible to polish that back so any further repair can avoid re-shooting the roof; if not, should be able to backtape that contour.
The flaking on the quarter could be from a lacquer primer and/or paint that began cracking and over time allowed moisture intrusion.
Repair will involve expanding that area to clean it up, but at least you have good contours for back-taping.
Check around at local paint suppliers to see if there's a painter in your area who's skilled at solving these types of problems; it also requires an enthusiasm for the task.
Agreed, chances are the repair area was lacquer based, as that was SOP back in day for blended collision repair, you'll need an experienced painter/mixer to achieve an acceptable blended repaint, IMHO knowing what limited paint choices that are available in single stage, Dupont Centari Acyrlic Enamel is perhaps the best choice for an "old school" blend, you do have a good roof line edge above the gutter to backtape, and to take the blend further along and hide it into the roof...
before repaint though the entire car should be properly paint detailed so the blended repair actually "blends in" from an aesthetics point of view...
be prepared for lots of spray outs and material costs before the repaint even takes place, color match won't be your biggest hurdle, the metallic shape/content/brilliance will be...
AFAIK Centari Acrylic Enamel is still available in NY as I had purchased some just about 2 yrs ago from a NY mixer, but supplies of single stage are drying up or being discontinued because of VOC compliance, so don't dwell on this project, or a entire VOC friendly repaint could be in your future
