So, update time. I've taken the entire bed apart, because all my previous work on the floor turned out to be for nothing. So, off to the blaster it went. First into a low temp oven to burn off stuff that can't be mixed with the blasting agent. And then sand.
Nice and clean, and it started to turn brown already when I got home. So, after a quick grind to take the worst off again, it was time for a stinky 2 component anti rust coating :
Smeared it on both sides to give the protection it needs as long as I am working on it. It has about 500 holes drilled into it, because it probably has seens several wooden floors in its 40 year life span. And some rotten parts. Some small, some somewhat bigger.
This was by far the biggest piece that needed attention. Patched with a home made patch panel. Folded and hammered with Chip Foose precision.
This was a quick test strip just to see if the ye olde brake press was up to the task. It was, up to a certain point, as some folds weren't equally sharp due to 125 years of wear on the press. But that was solved by hammering and thus relocating the folds.
I have more photos, but they're on my laptop and this was all that was left on my phone.