Make sure to watch the whole video, Ian starts with grinding rust but then goes back and shows removing the floor. Ian demonstrates an excellent technique that I borrowed on my bus, by removing the plywood panels and rubber at the same time, thus saving a step if you plan to remove all of the flooring.
The Bus Experience
This is an excellent example of working smarter, (you still have to work hard – you are converting school bus!) After finding this little gem online from “The Bus Experience”, I knew this was the way to go for my floor removal.
This was the technique I used. I would pry up the board just enough to set a chock block in place so I could maneuver the floor jack in place. Once the panel was up, I would just cut the rubber with a utility knife and remove the board, rubber and all.