We take chrome for granted. In a bathroom, a faucet is exposed to water, soap, humidity, and cleaning chemicals every single day. Yet, we expect it to look like a mirror for 10 years.
If you are a manufacturer of sanitaryware or automotive badges, you know that achieving this "eternal shine" is a chemical war.
Chrome plating is porous. If the layers underneath (Nickel and Copper... https://cometenvirons.com/