Cast iron. Season cast-iron cookware before using it. Brush the sides of a pot, pan, or saucepan with unflavored vegetable oil, then pour in enough oil to cover the bottom. Heat in the oven at low temperature for an hour. Remove, let cool, pour out the oil, and wipe away any residue with a paper towel. After each use, wash with hot water and dishwashing liquid, and dry thoroughly to prevent rusting. If you notice rust spots, scour with steel wool and a little vegetable oil.
