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by gwking 958 days ago
I have done it. I picked a lodge cast iron off of a stoop once and it had started to rust. I used fine grit sandpaper in an electric sander and got a decent result. Compared to the other lodge pan that I bought new, the one I polished is smoother and nicer to use.

[edit]: I did not polish it nearly as much as the mirror finished ones in the link nearby. I only did the cooking surface, and probably worked on it for 15 minutes.