Man, wouldn't that be nice! Coat the whole engine compartment with it, and just hose it off once in awhile. No more scrubbing every little corner.
The middle carb gets my vote, and that's what I remember the service replacements looking like out of the box. That said, it's been 30 years since.... It's a nice problem to have, having to choose between so many finish options. Please let me know when you have the process nailed down, I have a M4M just waiting for a home....