Lower door patch repair

My 65 Barracuda had the same problem. Por 15 was used and then painted. I have had no problem.

Ya, POR 15 is great stuff. But my inner door area is rotted away right where it suppose to go into the fold of the outer skin. And then there is a 90 degree bend within a half inch or so. I was more looking for an idea on welding the inner piece back on so I would have something to put into the fold on the outer door repair panel.