Aluminum Part Original Finish Questions

[RamAirBirds]

Doing some Vapor Honing with a local place here....
What is the feeling about original finish / shade for the following Aluminum Parts..
Muncie Trans Case/Tail
Bell Housing
Chevy / Pontiac Aluminum Intake
Alternator
Distributor
All of these must have been cast with possibly different Aluminum compositions....I guess....But would they all have the same "SHEEN".
I feel I have seen nice original Bell Housings that appear more "shiny / polished that the other parts.
I feel I have seen original Alternators and may distributors that are "Darker" than Muncies or Intakes etc...
Many people are moving towards Vapor Honing for Finish and my firsthand experience is very positive with the outcome. Media Size and such can deliver different results. Trying to get some real info...ANY INPUT IS WELCOME...This Thread may serve to help others down the road.....
Thanks SCR Community for any thoughts or examples.....