Back Glass Re-Seal Abort!

Sun destroys vinyl and tiny cracks breathe moisture. Cheap backing wicks it everywhere. I know a guy who repainted his vinyl top every year, a different color. I bet his roof didn't get spot holes.
Sacramento area is NOT dry..
The entire valley is wet as a shag, that's why the whole valley is fruits and vegetables.
Where I live we have salt and bad winters, central CA is f'n moist!
Whichever side of the car has the least rust got morning sun.
The part that rusted worse was the part that stayed cool in the morning and collected condensation.
I've seen cars in driveways in New York state with moss on one side of a vinyl roof.
My brother had a 73 4 door Caprice where the holes in the roof were visible through the double-pinpoint perfect headliner, the previous owner simply pulled the offending vinyl off and left the holes.