Exactly what at Steve said...consistency is the key. I use a relatively inexpensive CEM brand device...probably stands for China Electronics Mfg...or something like that...but it is consistent. On GM lacquer vehicles, I typically find between 3-5 mils on original finishes. It's when you start measuring 7+ that sends up red flags. Can't speak for Mopar or Ford as to typical original paint thickness to be expected.
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Steve Nuwer
1970 Z28, Norwood 03A, 48 48, 723 Int, M20, COO, 2021 Legends Platinum restored
1970 L78, Norwood 04C, 17 17, 711 Int, M21, COO, born-with drivetrain project.
1972 Z28, Norwood 11C project, born-with drivetrain, 26 26, 775, M20, CGG project
1970 Z28, Norwood 05C, 48 G, 720 Int, M21, COZ, Original Unrestored (SOLD)
www.2ndGenZ.com
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