Maybe they changed the procedure by 1972 but from the photos there is no other logical explanation if you go layer by layer. Top layer is white, middle layer is undercoat and bottom layer is red oxide. If you chip off a piece of the oversprayed undercoating right next to a white section of metal, you only see red oxide. Here's a shot of the untouched front lower cowl area. You can see where the original paint has flaked away from the black undercoat/sealer from overzealous pressure washing (-my fault) On the rear frame rail the large red spot is where a large glob of undercoating fell off during the cleaning process, leaving only red oxide. If the car was painted white before undercoating, there should be white overspray under the undercoating and not over. (Now I'm sounding like a scene in the Movie Airplane: "Roger Over, Over Under, Under out") Do we have any former Norwood employees out there who can chime in???