My attempt at inner roof rust repair

[yfs200p]

Well, i dove in head first to the inner roof of my cab today, but i don't have enough time to finish it before the Super Bowl. So i figured i'd put up a couple pics and maybe get some constructive criticism or helpful ideas from guys who have done this before.
There were only 2 spots rusted through on either side, and one or 2 small pinholes, but i cut out way more than that to be safe. Rather than taking the outer roof skin off, (20,000 spot welds to drill out) i decided to POR-15 as much as i could, in hopes that it would drastically slow down or stop the rust inside.
I have never done any auto body and very little welding before this truck, so please if someone notices something obvious that im doing wrong, dont hesitate to say it!
Stay tuned for more pictures this week.

Heres what I started with, 2 small pieces cut out to get a better view inside.



Then cut out 2 larger sections, leaving the middle intact. I did this because i think splitting the patch in 2 will make it easier than trying to keep monkeying that long piece in and out for fitment. Also, the middle stays welded in so the roof doesn't get out of whack.



Here are the old pieces laid out on the new panel, getting ready to cut them out. That will be another day this week, it takes some courage to put the knife to a $100 piece. (I cut it three times and its still too short!!)



Then i taped a paint brush to a really long flathead screwdriver and POR'd as best i could inside the roof, taking extra care to really put alot on the seams to keep the rust from advancing. It looked pretty clean for the most part, but there was some scale building up inside. I also slopped some on the front, where the windshield seal covers.



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Now the easy part is over, and one night this week i will work on patching it back up. Off to watch the NY Football Giants put a whooping on the Patriots!