So I got a stomvi combi, used and worn but still in good playing condition. It's pretty scratched up, not too noticeable from a distance but definitely up close. I was always used to silver trumpets, so polishing them and keeping them shiny and healthy was a habit of mine. What I'm interested in is doing the same for my gold trumpet. I want it to shine once more. What can I use to make the gold shine and keep it that way. I know gold normally requires little maintenance. I've heard of just bathing it with warm water (or hot) and soap (will any brand do?). Also heard of hagerty products. Input guys?