I parked my 33ft B-Ridge 5v on my driveway, positioned my rolling scaffold on one side, then used a razor scraper to gently remove the heavy application of dicor directly over each roof screw.
I was not looking to remove all the old dicor, (old dicor is a good base to apply eternabond tape to). I mainly was looking for a somewhat flat surface to apply the tape to.
* I would remove about 7ft of dicor, then clean thoroughly with soap & water
* After ensuring that surface was dry, I would then carefully apply a roll of 4'' eternabond tape over the screws
* Did the above steps down both sides, then both front & back of RV
* I then used the same process above (along with a pencil, compass & some metal shears) to splice several short pieces around each roofing protrusion, (for example, pipes)
If done correctly, you will end up with a "roof over a roof"
Do yourself a favor & visit eternabond's website to learn more about this amazing product!