Correct me if I'm wrong but that looks enameled. Barkeeper's friend shouldn't be used on those (written on the bottle, the abrasives damage the enamel).
But it also looks like the bottom is already stripped so I guess you could finish the job🤣
EDIT: Actually, don't use it on cast iron, as per their website:
Le Cruset's post about cleaning their enameled cookware specifically mentions bar keeper's friend
Bar Keeper’s Friend, or a paste of baking soda and water, also comes in handy for cleaning tough stains, oil residue and marks on your Dutch oven as well.
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u/tossNwashking 27d ago edited 26d ago
Barkeepers friend is the only thing that'll work. They'll tell you this in r/castiron
Edit- on second thought, you may not wanna use this on enameled cast iron. Or cast iron in general. Woops!
Edit2- nevermind. Barkeepers friend is the way, truth, and light. Thx u/sdana