Meguiars ultimate black. Does not disappoint. Be careful when applying, it tends to stain the paint a bit if left on it. (I think all those type of products do).
I use marine products for that type of trim. Megs is great so is the 303. Any type of trim spray will work really some just more so than others. Just apply it to your rag first and then carefully wipe down the trim piece. No paint contact that way.