It simply needs a polish and needs to be ~sealed~ to keep the trim from reacting with the elements. Any polish in your stash, polish to your *gloss-refinement* level and then use any quality sealer, etc once done.

If it was me, I would use a Sonax 4/6 and then Ultima PGP.
If you were to spend a lil more, I'd skip the Ultima and use Cquartz UK.