Should I cook in the old carbon steel skillets I just bought at a flea market? And can I use them for campfire cooking?
You can season these pans by heating with salt in the pan until it is extremely hot. The salt is abrasive and will remove any particles when you rub it around the pan with a dry cloth. Be very careful as the salt is very hot! This opens up the pores in the steel. Remove the hot salt and ad some veg oil, olive oil or what ever you have and let it season the pan. The pan should now be non stick and the heat has sanitized the pan. Remove the oil and wipe with a paper towel.