It is tough enough to get an original look to the alternators, but it is even more difficult to keep it looking that way.
That bare, open aluminum soaks everything up.
While not perfect, I glass bead the cases and then experiment with flattening agent in 2 part clear till I get the look I want. It lasts indefinitely and looks very near to original when done right. Been doing it that way for decades.
So if I have an NOS alternator made in 1970, exposed that way, it's surface will therefore not be as when first made.
Not like that NOS one has been hermetically sealed for 50 years.
So therefore it's still a crap-shoot as to what's 'original'.
