Sharing a bit of love with our kitchen site, we ran across the most interesting article on Curbly.com that we just have to share.
How to salvage a cast iron pot by Chris Job was very informative. We'll give you the abridged version after the jump but go over and check out chris' step by step instructions complete with photos for yourself.
1. Taking your piece outside spray it all over with oven cleaner, place in a plastic bag and seal with a knot-leave overnight.
2. Wash with soap and water to remove cleaner, scrub with fine grit sandpaper to remove rust [there are some other ideas on the site for this].
3. Heat with coarse salt and vegetable oil and scrub while heat is on with paper towel.
4. Re-season the iron by using lard or bacon grease and heating it in the oven for a couple of hours