I've been trying out something new (to me anyway). It has limits. This will, I think, only work on quite small areas.
Really good quality Aluminium brush on paint seems to work very well. (It's so thin it leaves no brush marks yet covers in one coat).
The colour match is remarkably good, it's shiny and it wears well.
I took some photos but to be honest they don't do it justice. In the photo, the chrome on the top of the piece was worn completely away and the face not too bad but pitted. The top has been painted with aluminium paint and face left chrome. The dark line near the top of the face is reflection from the flash and is on the original chrome. Like I said, the photos don't do it justice.
Anyway, only a small tip, but it does work on small areas.