... 3>Surface treatment: Enamel outside,matter black inside Cast iron Enamel wok Pan Size37×Φ31×8.5cm43×Φ37×9.5cmWeight3.2kgs4 ... oil to the cooking surface of your pan and pre-heat the pan slowly2> Avoid cooking very cold food ... removing stuck-on food, boil some water in your pan for a few minutes to loosen residue, making ... it is still warm.4> Do not let your cast iron air dry, as this can promote rust.5> ...