Chevrolet Advance-Design trucks (1947-1954) were all ". . finished in high-luster Dulux synthetic enamel which is baked on in thermostatically controlled ovens" (1947 Chevrolet Truck Data Book)
Air-drying Duco (lacquer) was provided to repair shops, so that repairs could be made without needing a baking oven to dry the original-type Dulux paint.
I stand corrected Tim. I must admit I never shot any trucks during my tenure, just going by what my instructors said in trade school.
