So, I got this stuff called Ospho, it’s really cheap and you buy it by the gallon..
When wiped onto a rusted surface, it turns the rust into a black primer like substance..
It’s really amazing how well it works..
I just completely covered all of the parts I had with it (liberally) and let it dry..
these pics are what it looked like once it dried..
(It dries kind of bubbled up, but it brushes off easily)
I ran over the whole thing with a piece of sandpaper, and it became a really good surface..
here are some of the serious problems with the floorboard…