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- #21
The PTG is an instrument that reads the total thickness from the metal to the top of the paint layers. Do a search on Mike Phillips articles on paint thickness. The gauge will NOT tell you the amount of clear coat left. As Mike tells it, a single sheet of a sticky note is thicker than your clear coat over your color paint layer. So using the PTG you will see a pattern that will vary where you read on the car surfaces.
I agree that most likely you are still safe but using a compound like 105 is aggressive and that you are still likely safe but can do this only a few times and you will see the clear coat starting to degrade if left in sun a long time. KEEP your truck protected at all times is my advice, my son's old Tundra cost me $2500 to remove the paint on the hood and cab because it went too long without care.
Thanks !