Sorry, deleted to rewrite. The factory photos I find and the NOS parts I find, show black generator case with aluminum color end plates and black pulley/fan blades and brackets.
Starter shows all black except nose is unpainted. Some have "aluminum" colored end plate also. Many end plates are aluminum.
When I have a question about "factory" correct, I go to Ebay and search factory sales brochures for sale, for the year/model in question. Many are black and white. None have actual photos and some are "artist deceptions". But they do pay off sometimes.


Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn