The car doesn't retain its original drivetrain anyway, so I am not super concerned about it being factory correct. I was just curious to know what is and is not correct. Thanks for the tip on the copper pipe...i plan to polish it!
I used the polish and satin clearcoat on a lot of components. It gives them a sheen without looking shiny, They clean easily and they don't tarnish.
For copper or brass I use a wire brush or steel wool to get them clean, then metal polish to shine. Then I clean with Prep-All to remove the polish residue before clearcoating with Wurth clear wheel paint.
For steel parts like the air cleaners or throttle linkage, I use my wire wheel to shine them up as uniformly as possible. Then some metal polish if necessary. Then Prep-All and clearcoat.
For fasteners, I use the wire wheel but hit them with a shot of cadmium-look spray paint before a shot of clear.
The best trick is to bake them at about 200-250 degrees in a toaster oven for about 5 minutes after the clear coat. It really hardens the paint. I bought a cheap toaster oven for the shop after the wife complained.