I have always wondered if the enamel auto paints that were used in 40's & 50's "changed" colors due to the materials (chemical changes?) used or if the colors could change due to heat. I am not talking about fading like the exterior of the truck, but those hidden spots in the interior that would only be subjected to extreme heat when the doors were locked and the windows were rolled up on hot summer days. I know the old house paints would "yellow" ANY color due to the linseed oil. Thanks in advance.
