In the event I decided that I'd just go with the one coat, for, reasons. Next time I'll go with two thinner coats (maybe with more thinner, even).
No adhesion problems taking the tape off, except for one spot where there was some putty way at the bottom to which the dope didn't stick, and a spot on the canopy where some paint came off (and -- it's a canopy, I knew that was going to be problematic).