Yesterday had no rain and we got several rain-free hours today, so I :
removed the next section of floor
inspected the frame, which was rusty but the welds look fine.
Did the standard wire brushing, with sand blasting where the brush can’t get.
and added two coats of Alumathane. Here’s after the first.
After the same adjustment with the pipe clamp I got the floor in place and attached. Forgot to take a picture. This completes the four flat floor sections.