Yes, burnt copper can be cleaned with a mild abrasive such as sandpaper or steel wool.

There are many chemicals that can be used to clean burnt copper. Some of the more common ones include ammonia, vinegar, and hydrogen peroxide.

Copper pans can turn black from a variety of reasons, including using too much oil or fat, overloading the pan with food, using an abrasive cleanser, or leaving the pan on the burner too long. If the pan is showing signs of oxidation, it needs to be replaced.

Yes, white vinegar can clean copper. Vinegar is a natural acid and will corrode copper.

Acetic acid, the main component of vinegar, will corrode copper.

Yes, caustic soda will clean copper. However, it is important to use a diluted solution and to avoid contact with the copper surface.

Apple cider vinegar can be used to clean copper, but it is not the most effective method. Other methods such as using a detergent and water mixture, or using a brass cleaner are more effective.

Lye is a strong acid and will dissolve brass.

There are a few ways to restore a copper pan. You can use a cleaner, such as oven cleaner, white vinegar, or lemon juice; a degreaser, such as Bar Keepers Friend; or a copper polish.