AutowerxDetailing
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- Apr 10, 2012
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Unless you've spent thousands on a ultra-sonic film measurement gauge that has the capability to differentiate between various substrates... all you will - EVER - get is total "film" to metal.
Depending on the surface you are measuring and the paint system that was used sometimes even the ultrasonic "multi-layer" gauges will only be able to measure total thickness. On metal panels this is especially true because the substrate is too "noisy" for the ultrasonic sensors to differentiate each layer accurately... especially with thin OEM paint.