Getting 50-100++ calls a day on tech line, I'd rather take a beating then have to try and figure out a fisheye problem, like pointed out, soooo many things it can be.
Years ago when i would do a paint class for painters in the evening, I use to clear a fender at start of class and have one of the guys stand there and keep touching the clear until it was dry to touch. Then I would from two feet away, spray some armorol and the fend would turn to solid fisheyes.
Solvent pops just seem to be easier to figure out, as there are ONLY 50 things that can cause those. LOL