1. After the cab was shot with the Keystone Automotive PPG K36 primer, it was lightly sprayed with TECHnique Painters Coat Guide. This material is used to ensure that the body is smooth. The Painters Coat Guide was block-sanded with 320-grit sandpaper and then the entire area to be painted was DA'd again with 400-grit sandpaper. Any areas that couldn't be sanded with a machine were sanded by hand. The cab was ready for paint once Erick Wells and his crew were satisfied that the body was smooth.