How to Use a Paint Thickness Gauge (And Why It's …
After applying a coat to the substrate, test the thickness in an area that's out of sight. STEP 1: Using the edge of the comb with the smallest set of micron thicknesses, press the comb down evenly, at a 90ø angle to the paintwork. The outside teeth will press against the substrate and paint will mark the graduated teeth of the comb.
