Sorry I must have indicated that I was talking about the painted surfaces of the vehicle. I was not. I was referring to the shine that was applied to the engine compartment and the vinyl interior when a used car was send out for cleanup. The engine was usually power washed and then sprayed with some type of shiny coating. Maybe is was a clear of some type, I don`t really know but I don`t think so. It was not a store bought coating that was sold at the time that I knew of. This was back in the 70`s when I was a lot boy at a car dealer and loved how nice they looked after coming back from cleanup. The vinyl door panels looked so nice and shiny for a long time and weren`t greasy or oily.