Scrub off rust and debris with steel wool or a stiff brush
Wash the skillet with hot water and a small amount of dish soap
Rinse thoroughly and dry completely
Remove stubborn rust with a paste of baking soda and water or white vinegar
Rinse again after using vinegar and dry immediately
Wipe the skillet with a thin layer of cooking oil
Place the skillet upside down in an oven at 450 to 500 degrees Fahrenheit
Bake for one hour to restore the seasoning
Turn off the oven and let the skillet cool inside
Repeat oiling and baking if the surface still looks dull or rusty
Store in a dry place after each use
Avoid soaking the skillet in water
Re-season regularly to maintain the finish