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Maybe.
I think it could look good with a fun paint job, but a lot of me would like to keep it looking like it does now. So yeah, hmm, clearcoat!
I'm concerned about adhesion to bare metal, though. The difficulty will be in providing enough of a key to allow the lacquer to adhere well, without putting abrasions in the metal deep enough to be visible once filled by the clear coat. Going to have to accept that it will loose some of its lustre if clearcoating, and the process itself is a balancing act.
Could practice on other pieces of polished aluminium first (with varying degrees of key abrasion before clear, to find the best appearance/adhesion/durability compromise)...
Flatting and buffing the paint is another PITA, too; Could spray on thick so it dries more glossy, but at a greater risk of runs, and will take much longer to dry/cure than many thin coats, but these will leave an orange peel surface that will need a lot of finishing.
RE actual paint job, was thinking about a darker colour around BB & stays so it looks less dirty, so I'd feel compelled to clean it less often.
TLDR Edition:
#01 (polished) = staying as is. May get paint job later in the year.
#02 (black) = from TT to workhorse build. Will get a few new bits.
#03 (grey) = from workhorse to TT build. May need to paint a few bits.