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Cleaning 1930s heavy brass tray

I have a 1930s heavy brass tray and I tried to clean it BUT it has black spots which do NOT come clean with Brass cleaner-HELP PLEASE. thanks - I just tried to clean with Brasso ⇦this on eBay or Amazon [affil links] my 1920s heavy brass tray BUT the black tiny spots will NOT come clean-what to use please?thanks I do not have a camera for the comp
Helen Kazimiroff
- Lomita, California, USA
2006

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Hi Helen,
The tray is likely leaded brass. Brasso does not work very well on leaded brass. I don't know of a home remedy that will work well for you. You could take the tray to a professional plater in your area and they can properly clean and polish it for you. The chemicals used to properly clean the piece are not suited for home use.
Mark Baker
Process Engineer - Syracuse, New York
2006

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Try 5% ammonium citrate(mix 50 gm citric acid ⇦this on eBay or Amazon [affil links] /1 lit water and some ammonia,pH must be 9),or only citric acid /water solution.Hope it helps and good luck.
Goran Budija
- Cerovski vrh Croatia
2006