If you want to clean your brass item yourself you may still consider one of the following cleaning methods. Ketchup, vinegar, baking soda, soapy water, toothpaste. Read more
How to Clean Brass and Restore Its Lustrous Shine — Bob Vila
How To Clean Tarnished Brass : 5 Most Effective And Easy Methods
About Brass Metal & How to clean Brass Jewelry
Clean Brass Jewellery — Two In The Sun
6 Ways to Clean Brass With Everyday Household Items
How to Clean Brass Hardware: 5 Easy Methods
How to Clean Brass: 7 Expert Tips to Polish Like a Pro
How To Clean and Polish Brass: Your DIY guide
How to Clean Brass: 4 Ways to Clean Brass Hardware, Fixtures
How to Clean Brass with Bar Keepers Friend - Bar Keepers Friend