Caring for Brass
Unlacquered brass tarnishes when exposed to air.
New pieces are usually lacquered. If lacquer wears off in
spots through use, have a professional relacquer it. It
can be done at home, but all old lacquer must be removed
first, and the surface completely clean (no fingerprints
or cleaner on it) before spraying the lacquer on evenly.
It is hard to do well.