How darkened brass?

Brass is a natural material becomes more beautiful with time.
Indeed, brass creates a natural layer of brown-black color on the surface to protect themselves against corrosion when exposed to an outdoor environment. Its original yellow color is then less bright and full of character material.

And if we haven’t the time to let the nature take it course … ?

Nothing easier! You can simply apply with brush a layer of ammonia over the entire surface. After 24 h, a patina is visible, but if that is not enough for you, do not hesitate to repeat the operation.