I recently bought a CM8801-FN Paint Thickness Gauge, and would like to use it to determine if a car has had body damage. Basically, according to what I've read average factory paint thickness on modern cars is in the area of 2 to 6.5 mils ( 50 to 150 microns ) and my assumption is that a panel that's suffered damage, had filler used to smooth it out or even just been repainted will either show significantly thicker coating readings, or be too thick to get a reading ( if filler was used ).
Are there any problems with my assumptions? The only one I can think of would be if a panel was replaced with a factory painted part.