13) With your assistant, peel back the rear half of the vinyl. Do not allow the vinyl to fold as it may cause wrinkles or stick to itself. Mist both the roof and the vinyl. Cut off the vinyl backing. (NOTE: do not wet any vinyl backing as it will be a PIA to remove from the vinyl. There's less pictures here as we were focused on the install.
I'm a bit confused. Wont the vinyl backing get wet no matter what since your are wetting the roof. Once you wet the roof your throwing the vinyl over it. I think I mis-understaning something