In my experience Auto Painting, Fisheyes come from not having a perfectly clean surface, and not using the Fisheye preventer..
I am glad they are going to try to make this better.. I bet they will just sand it all down past all the defects, clean it up better this time, and reapply, minding how much product vs air is being sprayed..
Back in those days, all we had to clean the work with was a couple of different solvents, Prep-Sol and Enamel Reducer (if spraying acrylic lacquer), and then a good Tack Cloth to carefully go over the entire surface in the Booth right before spraying the paint..
If you accidently even touched the paintwork with even your fingertips, there was the chance that that spot/s would Fisheye on you, so you could never touch the vehicle with your bare hands - ever - once you started the clean process...
The Total Paint Thickness meter is just that - it will measure in mils, or microns, the Total thickness of what is on that spot it is placed on only..
Only the most expensive Meters, the DeFelsko - around $3,000, will give you a look at the individual layers of material, you have to determine what those layers could be, and if you don`t know the history of the paintjob, it will always be just a guess..
All I use my Meter for is to measure the Total Thickness in Microns, and then correct the spot, and determine how much of a Micron I removed to correct that spot, taking into account how much the Client is spending on this phase of the Detail..
Typically, I try to never remove more than 1/2 a Micron if at all possible..
Yes, one can take All the defects out of paintwork and perhaps remove a lot of the Clearcoat, and the next week the Client will get it all scratched up again..
Now, what do you do ????

Dan F