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I heated up a cast-iron pot in an oven and might have burnt the lid. Is it possible to restore it back to its formal glory? ( 

https://i.stack.imgur.com/Wby8T.jpgenter image description here)

I heated up a cast-iron pot in an oven and might have burnt the lid. Is it possible to restore it back to its formal glory? (https://i.stack.imgur.com/Wby8T.jpg)

I heated up a cast-iron pot in an oven and might have burnt the lid. Is it possible to restore it back to its formal glory?  

enter image description here

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How to recover a cast-iron pot?

I heated up a cast-iron pot in an oven and might have burnt the lid. Is it possible to restore it back to its formal glory? (https://i.stack.imgur.com/Wby8T.jpg)