Just discussed this today with my service provider...
As part of belt/chain/pad/pump/balance shaft service, my FILTHY rail cover and cylinder head cover will be blasted with walnut shell. The lettering will be painted with hi-temp enamel, and then the pieces will be powder coated clear.
He showed me a chromoly motorcycle frame with this treatment...the blueing at the welds showed perfectly thru this powder coat. It was a really cool look and effect.
He said it will be a slightly darker grey than the cleaned raw aluminum, obviously a slightly different texture, and it will be easy to clean and will hold up very well. Couple hundred bucks---relative to everything else I'm spending to get this engine up to speed, it's nothing.
Anyway....I had never heard of "clear" powder coat, but that's my plan of attack for this particular task/project. Thinking maybe there is a "shiny" option versus chrome?