WOW, if you have the old black cast iron , KEEP IT and use it as IS THE BEST and has met the test of time...BONUS is when used for cooking, leeches iron into your food (especially if tomato sauced,lol ) Hard to find REALLY good black cast iron, and when need to re-season, yes, heat them and use salt...but folks, should NOT "wash", just wipe clean , oil (with evo ) to keep non sticking !!! (have done the enamel coated iron pots as well, but they do NOT take the abuse...forgot the teakettle and ended shattering the enamel right off it from the prolonged heat exposure...have done that twice , argh !!! And the other pots can eventually discolor and crack /chip as well thou does take a bit of wear and tear to do so !!