We put a Blanco granite composite sink in anthracite in our kitchen. This is the almost black color. As advertised it has held up well and we are very happy with it, but I noticed it doesn't look as black as it used to IMO. Anyone know of a way to bring back the black color? I don't know if I've used too much BKF and have etched the surface, or if it's calcium from the hard water, but it sure doesn't appear as black as it did when new. It's only a little over 2 years old.
Thank you for your suggestions,