Home DIY

Something like Brasso, assuming you aren't going to be polishing it too frequently.

Brasso liquid not the wad (wad is good for small jobs and keeping up a decent finish).

Clean it all first with something to get any gunk or grease off it. Dry it. Tape off area around so that it doesn't stain. Brasso juice turns anything black fairly permanently.

Would use a fairly aggressive cloth with brasso liquid first, white cotton dish cloth, the foam part of a dish scrubber (scotch pad side prob too aggressive) or even get a 'magic eraser' and work away at it. Have found doing a little work on the whole thing then letting it sit for 10 mins helps.

Brass thins and wears away over years, mostly from traffic and polishing. Have seen some clear lacquer coats put on heavy wear areas before and without fail it blisters and looks rancid. The best finish is a good smooth even polish all over it, metal should be fairly glass like in feel. Salt from boots in winter is defo worth wiping off as often as possible.

Had a double take because that's weirdly similar to mine.

Brasso is kind of a go to for me but I had a client did some brass with lemon and salt or baking soda.

Have a google there's loads of examples and it certainly looked easy to do.