I am very familiar with olds cool and D's work for sure 👍Did you check the whole door horizontally with a straight edge? Especially adjacent to the patches in the middle of the door skin. With the look of those welds, I doubt he took his time so he didn't overheat and warp it but you could be lucky( you are judging by that vinyl roof) What rust converter did you use? Some of it has acid in it and isn't suitable under epoxy primer. Take a pick and poke at the areas you've "converted" underneath will probably be brown rust. The only stuff I found that worked (barely) is ospho. As for the inside of the door. Blast it with epoxy primer, then before it cures poke the weep holes clear. Then sling a bunch of cavity wax in it. That's my plan anyway.
I've asked him many questions and he takes the time to explain to the Nth degree. Also Kevin Tetz among many others on YouTube. I bet I've watched 100x more than actual work time I have on body. I am addicted to watching stuff like that.
The door looked almost perfect when it was on the car. I have a small ding dead center that I have to hammer and dolly. When I'm done stripping it totally down to metal, I have a feeling I'm going to have many scrapes and scratches on forearms from reaching inside door to do what's needed. The converter i used is Eastwood stuff. It's made to go under epoxy primer
Time will tell. If I mess up I'll start again. I'm really digging this stuff. Sanding every nook and cranny. It's tedious but I'm learning a ton. The only downside to me is the mess.