I hear you, and thank you! That means a lot.I read it all. I found it scary. First because of rust on my own vehicle that I'm not aware of and second, because how few bodymen that can do your level of work, and third, how much time and money to do it or get it done well.
I figured the same thought, and I was going to address that last, as I have to detach the headliner in a few places. Thanks for the heads up!Exactly right, yes. If the rust is making its way through into the gutter like your last pic, it almost certainly exists on the inside.
Oh that is perfect, thanks for posting the photo. Looks like you did a great job and thorough! I actually need a rustproofing gun to coat the underneath side of the cowl rust sections and rockers after I weld new pieces on. So, I will be able to use that in the roof too, but that little can looks sweet! I like the tip on that, it has 180 degree spray pattern so you cant miss. Really cool, thanks!The headliner can be pulled down from one of the rear door openings, then a straw type tool can be used to cavity coat the entirety of the inner skin structure. Apologies for posting a pic of my truck in your thread, but you're aiming for the square hole visible above the rear doors here:
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Then a cavity coater with wand like this to access as much of the length of that rail as possible. This should be the minimum-impact way of getting in there: