I would bet that COE door skins are a lot easier to make than cab corners and also require a lot less specialized tooling.
I was just thinking about this today. Someone has to know if this is how the corners were finished. I have a rusty ‘37 cab and it looks the same. I’m shaping the rear panel of my ‘36 cab now (might share that process if anyone is interested) and will be on the corners soon. Anybody know the answer to my original question?
Very sorry to read this but I do appreciate how you helped the hobby for many years. I have one of your boxes and running boards on my '39 pickup and they are both spot on to the rusted out and dented to death originals. Hope your C.O.E. project is finished, the avatar photo looks great!