I got the other door primed and just coated the inside with a Eastwood Product - Heavy Duty Anti-Rust. This product is designed for used where it is hard to prep the surface.
I plan on installing the driver door tomorrow, that is later today since it is very late.
Here is the before with bad rust damage.
And the after.
And before and after of the other end.
And the side that counts.
I started this restoration using Kirker Epoxy Primer, I ran out and ordered Epoxy Primer from Summit, since popular belief is the Summit Primer is repackaged Kirker primer. The Summit primer is not exactly the same. Both have similar not not identical claims. Both spay about the same, but the Summit primer dries with a higher shine than the Kirker primer. I can't tell that either is superior to the other. The only thing that I have noticed is the Summit primer has a slightly longer pot life than the Kirker. The Summit Epoxy Primer is cheaper than the Kirker primer and in my case, I get next day delivery since Summit has a warehouse in the Atlanta area.
Now for re-branded products that are the same. Do you want Rage Extreme for $34 per Gallon. Just buy the FinishMaster product called "Smart Premium Body Filler" Part number SBF1192. The content list is exactly the same for Rage and the FinishMaster Product. I also used the two products back to back and can say they are the same. FinishMaster has locations in most major cities. I'm not sure if the ship however.