Metal int. window trim color

[PalAl]

I am in the process of refinishing the interior metal window trim on my 1929 Standard Fordor Sedan 165-B. The present color is black however the back side is a brown color that does not appear to be a primer as it polished to a nice gloss when a little wax was applied. My question is, would the trim color for my year and body style have been brown or black? If it was in fact brown, would the dash rail and gas tank also have been brown?