Measuring Paint Film Thickness

Before any abrasive removal, measure the initial film thickness at several places to establish an average figure. After each abrasive step measure several places again to determine how much paint film was removed. Follow the instructions provided by the manufacturer of the mil gauge you are using for measurement and calibration. If you do not have a thickness gauge use the following rule of thumb during abrasive removal; When the "orange peel" surface is removed, 0.5 mil has been removed.