I have the phase 2 ptg 3500 and a elcometer 456 with bluetooth and a etc8829 and two gloss meters
as for the 2-4 microns it varies up and down on different clear coats i have tried it on with this cheaper coating gauge but for the money you can go wrong
it is hard to get the same reading twice in same spot but i have done it a few times' to do the test i put in same spot everytime you just have to be slow and careful take time
i have a few goodies in my box
