My rusty cowl repair so far...
Just an update... It's been a couple years since I did this and so far no major leaks and it appears the rust is not getting worse. Still putting the new windshield off for now. I expect to need to repair this the right way eventually. For now at least it works. My car is slowly coming along. Replaced both rear lower quarters with patches of new sheet metal. Turned out pretty nice actually. Not perfect but much better than it was.