Lacquer has poor adhesion to chrome, as do all paints. That's why it came off the screws, and would not have taken 40 years to do so. Corner pieces were painted in place. Color differences are not amazing because the paint on metal and the tints and pigments used in different materials are not the same.
Marty, that picture is not conclusive, indicative or definitive of a suede finish. To me they look nearly identical. The other blurry picture is worthless. If you study how reflections and highlights indicate texture, it helps to evaluate a surface. One has to know for photorealistic and realistic painting to produce an accurate and believable piece. Those surfaces deteriorated differently because they are in different locations. It's only natural some don't look the same. Light and shadow influence their appearance also. All elements must be taken into consideration when observing objects. Another subject entirely.
The body went though the entire paint prep process before those corner pieces were screwed in place. That is also why they may, but necessariy appear slightly different. The surface the lacquer was shot over was different. If one paints, one understands all these things. It helps if one has torn quite a few of these cars apart over the years also. Hands on experience makes a big difference in knowledge acquisition.