I am doing a frame off resto on a '66 conv. and have not found the info I am looking for on the underbody in any of the reading I have done. I am ready to paint the underbody and the only reference to it I find is "take care not to knock off undercoating" I found evidence of it in the wheel wells, but that is it. Should only the wheel wells be undercoated, or is the entire underbody undercoated? Was it primed, undercoated and painted, or primed, painted and undercoated? Was the underbody painted black or the color of the exterior (in my case cameo ivory) and would it be 60% gloss like the frame? Is the interior of the body painted black or the exterior color? Does anyone know where this info could be found? I have books on factory finishes, but all fail to go into the minute details.