Just found these pics which were taken when testing different blasting to see what finish was best suited.
Just for interest sake, the first is cleaning by hand, yuck! and very boring, then fine grit and then vapour blasting. The vapour leaves a nice factory looking finish.

I also get most things done also before they get plated as it gives a much better and stronger finish. Items which are placed under high stress are also baked to prevent embrittlement.
Some parts after vapour blasting but before plating

Same bits after plating








