![Black residue on eggs and after washing The Rock pans. Have owned for less than a year. Is this the coating? I have never put in dishwasher or used metal utensils. Wash Black residue on eggs and after washing The Rock pans. Have owned for less than a year. Is this the coating? I have never put in dishwasher or used metal utensils. Wash](https://preview.redd.it/mubh70bqdes91.jpg?auto=webp&s=d61e8573deedfd7880b5375e8f7deef7fb24f4df)
Black residue on eggs and after washing The Rock pans. Have owned for less than a year. Is this the coating? I have never put in dishwasher or used metal utensils. Wash
![Er... did I mess up doing the oxide layer on my aluminum pot? | Homebrew Talk - Beer, Wine, Mead, & Cider Brewing Discussion Forum Er... did I mess up doing the oxide layer on my aluminum pot? | Homebrew Talk - Beer, Wine, Mead, & Cider Brewing Discussion Forum](https://proxy.imagearchive.com/470/470229f85ebd37076f4c841d6b1d2653.jpg)
Er... did I mess up doing the oxide layer on my aluminum pot? | Homebrew Talk - Beer, Wine, Mead, & Cider Brewing Discussion Forum
![maintenance - What's happening to the coating on the OUTSIDE of my roommate's non-stick cookware as we wash it? - Seasoned Advice maintenance - What's happening to the coating on the OUTSIDE of my roommate's non-stick cookware as we wash it? - Seasoned Advice](https://i.stack.imgur.com/GW2ou.jpg)
maintenance - What's happening to the coating on the OUTSIDE of my roommate's non-stick cookware as we wash it? - Seasoned Advice
![Removing Discoloration from Aluminum Utensils • AnswerLine • Iowa State University Extension and Outreach Removing Discoloration from Aluminum Utensils • AnswerLine • Iowa State University Extension and Outreach](http://blogs.extension.iastate.edu/answerline/files/2013/10/aluminum-pans.png)