How to Use a Paint Thickness Gauge?
2 Answers
Specific usage of the paint thickness gauge: After turning on the device, simply place it directly on the car's paint surface. Within about a second, the screen of the paint thickness gauge will display the thickness of the paint. The function of the paint thickness gauge is to detect the paint thickness, check whether the covering parts have been replaced, and examine the material of the covering parts, thereby determining if there are any signs of paint repair. Precautions for using the paint thickness gauge: 1. Ensure the probe is perpendicular to the measurement surface when using the gauge; 2. Inspect the front and both sides of the engine hood, the front and wheel arch sides of the front fenders, the lower areas of the doors, and the corners and wheel arches of the rear fenders.
As a used car appraiser, I frequently use a paint thickness gauge to measure the paint thickness. The process is simple: first, clean the area to be measured with a soft cloth to remove dust or grease, as these can affect the readings. Then, gently press the gauge's probe onto the paint surface without applying too much pressure, holding it steady for a few seconds until the thickness value appears on the screen. Typically, factory paint thickness ranges between 100 to 150 microns; anything above 180 microns may indicate repainting or prior accident damage. In practice, it's essential to measure multiple points—such as the door tops, hood, and side panels—taking several readings at each spot to calculate an average. Also, avoid metal trim pieces or the vehicle's frame, as these can cause erratic readings. Finally, compare the values—if the difference between the roof and door exceeds 50 microns, inspect carefully for signs of refurbishment. The entire process takes just a minute or two, but it's highly practical for helping buyers avoid problematic vehicles.
