GM Service Manual Online
For 1990-2009 cars only

The clearcoat on the vehicle is typically 0.059- 0.078 mm (1.5- 2 mils; 0.0015-0.0020 in.) thick. The clearcoat contains ultraviolet screeners. Removing more than 0.5 mils (0.019 in.) of the clearcoat may result in early paint failure.