Is a Paint Thickness Gauge Reading Over 600 Indicative of Body Filler?
2 Answers
Paint Thickness Gauge Reading Over 600 is Indicative of Body Filler, Because It Exceeds the Normal Range. Normal Range for Paint Thickness Gauge: The normal reading for a car paint thickness gauge typically falls between 120 microns and 180 microns. If the paint thickness falls within this range, it generally indicates the original factory paint. However, paint within this range isn't always original, as some manufacturers may cut corners, resulting in paint thickness below 120 microns. Readings above this range suggest that the car may have been involved in a collision or has undergone repainting. Important Notes: It's worth noting that higher readings from a paint thickness gauge often indicate that the car has experienced multiple collisions or severe damage. For those interested in purchasing a used car, this method can help assess the extent of past damage and aid in selecting a better-quality used vehicle.
Having driven for decades and used numerous paint thickness gauges, a reading of over 600 microns usually indicates body panel repair. Factory paint typically measures around 100 microns. If it exceeds 500, there's an 80% chance it's been repainted. After panel beating, the surface needs sanding followed by multiple paint layers, causing thickness to skyrocket. I recall helping a friend inspect a used car once—the gauge showed 650 microns, and upon closer inspection, we found repaired dent marks on the door. This isn't trivial; accident cars carry more risks like steering wheel vibrations and higher rust potential. When inspecting, I always advise not to rely solely on numbers but also check body panel smoothness and seam consistency. If high readings appear when buying used, it's best to have an expert inspect the chassis frame—safety first. Routine maintenance should also monitor paint quality, as excessively thick paint tends to crack or fade. Veteran driver's conclusion: 600+ microns is most likely a telltale sign of panel repair aftermath.
