What is non lacquered brass?
In this regard, should brass be lacquered?
Although the vast majority of brassware on the market today has been lacquered in production, the brass should not be polished, but instead cleaned. Brass that is lacquered will feature with a clear layer and tarnish will only show up if a crack appears on the surface.
Keeping this in consideration, how can you tell if brass is lacquer?
If it is shiny and you have never cleaned it is likely to be lacquered. Also if any brass has unsightly black spots on it then it could be a sign of a lacquer breakdown. You can also do a little test. Get a soft cloth and some metal cleaner and gently rub the brass.
If you regularly dust and clean lacquered brass, it should stay tarnish free. Over time, however even lacquered brass may tarnish as the lacquer ages. Brasso Multi Purpose Metal Polish cleans brass as well as chrome, zinc or pewter without scratching or leaving a film.