I just bought some used cast iron cookware as I wanted to try cooking with cast iron before spending a lot of money on the more expensive stuff. It is an old French brand -- Le Cousances. The interior enamel is stained dark and rough to the touch. I have tried cleaning it with Easy Off and some of the other cleaning suggestions on this board, and while the colour is lighter, the interior still feels rough. Does anyone have any thoughts on whether further cleaning will be worth it, or is the cookware a write-off? Your advice would be much appreciated.