More Canvas Roof Questions

I am interested in the canvas roof also. We don't have a tear now, we sold ours a few years back because we just couldn't get in and out of the little camper very well. We do have a small camper and it is needing a new roof. I really don't want to go back with EPDM so I am thinking about installing 1/4 plywood over the old EPDM then waterproof with canvas. One question is how flexible will the canvas be once the paint is dried. Could a rubber base paint be used or should an oil base or Latex be used.
Does anyone see problems with this type install except for weight?
Jim
Does anyone see problems with this type install except for weight?
Jim