https://irvingdiner.com/how-to-flatten-cast-iron-pan-bottom-py259/
This has three methods: sanding, hammering, heating with weights. (not linking because I have no idea if the site is slop)
https://irvingdiner.com/how-to-flatten-cast-iron-pan-bottom-py259/
This has three methods: sanding, hammering, heating with weights. (not linking because I have no idea if the site is slop)