Method and installation for painting an automobile vehicle part by means of a primary heating

- The invention relates to a painting process a workpiece (10) of a motor vehicle, which comprises applying a first coating (20) on at least one surface of the workpiece, and then applying a second coating (30) on said the workpiece surface, characterized in that it generates a current in the first coating (20) after application of the second coating (30), and a first coating is used (20) constituting an electrical resistance adapted to generate Joule heat.