A representative of DuPont, a major corporate partner of Penn College’s School of Transportation Technology, visited the collision repair paint laboratory Tuesday to train students in the company’s waterborne basecoat products. T.J. Donahue, a refinish systems training instructor, worked with several classes including Michael A. Bierly’s Basic Refinishing Applications course in using the Cromax Pro process. “It’s very, very simple,” explained Donahue, who walked students through all of the steps, from matching and mixing colors to spray-gun application.