Lately I have been seeing 65-66 show cars with satin finish door sill plates. Can anyone provide any documentation or proof that they should be satin? Original sill plates were left natural aluminum alloy, they were not hot dip anodized like the seat side shields. Every original I have ever seen and even NOS, a little rub with some chrome polish and the rag turns black. Do the same thing with a seat side shield and the rag does not turn black.
My opinion is that over time, these sill plates will turn to a dull finish and corrode in some climates. I have seen several new car images which show quite shiny door sill plates. Attached is one such period photo o a '65 GT350 conversion.