That's cool I am glad things worked out for you. I have restored 2 advance design trucks and have made Thousands of patch panels for them. I am a full time fabricator and restore a vehicle as a filler (I am now doing Model A #2 a 31 Roadster) The problem in doing a car or truck that you are looking to do a high end resto on is super staight panels. I have personaly warped the back of a few trucks with even a light blast.
I can get it back by shrinking with heat IE shrink disc,or heat torch or weld and grind. But it takes a lot of skill and time rather than risk warped low crown metal. Sure if you are doing high crown parts be real carefull But if you have a cab with a lot of surface rust or paint sand blasting Will do harm.
Did you go over all the work and feel for soft spots and oil cans good work on panels should allways feel "tight"
I would much rather DA with the right grit on the outside and POR 15 the inside on some thing like a fragile pre war fender. Surface rust in pitted metal is removed with acid. I will sand blast around windshield openings door jams and the like. If you did sand blast your truck and things wooked out well that's great!
