Brass Plated

How to un-tarnish gold plated chains and brass charms?

I’ve got some gold plated chains that have tarnished and would like to know how to clean them so they look practically new. In addition, how to do clean brass charms and retard tarnish on brass charms?

Gold does not tarnish, I wonder what alloy the chains are?

You can clean brass with Brasso.

Brass plated aluminum legs