4chan_diy on Nostr: Not sure this is the right board to ask (t. tourist), but how do I clean this buckle ...

Not sure this is the right board to ask (t. tourist), but how do I clean this buckle back to its chrome sheen? No idea of what kind of metal, but it's typical metal used for bag straps.
Thread: https://boards.4channel.org/diy/thread/2844784