Copper is considered a noble, durable metal, but over time, a greenish layer can form on its surface. What appears to be a harmless color film can turn out to be stubborn verdigris. Those who want to ...

Q: Your Jan. 6 advice about using OxiClean to remove leaf stains from concrete prompts me to ask if it would remove green copper stains from a concrete driveway. The stains were caused by runoff from ...

Q: I think a copper teakettle was mistakenly washed in the dishwasher. Now it's covered in white spots. How do I get them off? Alexandria, Va. A: The white spots are almost certainly cloudiness in a ...