^Same here.
Was going to drill out all the spot welds and replace entire skin but ended up being able to cheat and just cut out what was bad and left the pinch welds alone, since the rot wasn’t as bad as I initially thought.
Bigger areas I cut to fit patch pieces out of the donor parts. Small spots I just welded up and any small rust holes along the bottom edge of the windshield frame, I turned into additional drain holes into the cowl area similar to the 2 factory holes.