[matrix_808]

i thought PTG measures the paint thickness on top of the metal. Someone else is saying that it measures metal AND paint.

[JLs Detailing]

If I'm not mistaken the more correct term for these instruments would be Coating Thickness Gauges. Thus they measure the amount of a coating over a metal either ferrous or non-ferrous. So I think it only measures the amount of paint.

[matrix_808]

ya that is what i thought, but there is this guy on another forum arguing with me that i dont know how to use my PTG, and that its measuring metal AND paint.

[Nica]

Huh, that's interesting can't say that I've ever heard that....but the paint gauges read surface only no the metal....but that's what I know