My Dear Friend,
I've always heard that you should season the cast iron pots before use. All of the ones I've ever used have been pre seasoned. How do you season them properly?
This one I have a lot of experience with.
Short form - wipe all surfaces with food-grade oil and place inverted into a 350 - 400 degree over for about an hour (place a baking sheet under it to catch anything that drips). Turn the oven off and let the cookware cool slowly. When completely cool to the touch remove from oven, wipe off with a clean cloth, and store.
This should be your best source of information:
http://www.lodgemfg.com/use-care-seasoned-cast-iron.asp
Here's Lodge's FAQ - great info here:
http://www.lodgemfg.com/use-care-help.asp
BTW - if you haven't figured this one out do not EVER use soap on cast iron - it removes the seasoning and will allow rust to start. Heat water to boiling in it and that will normally loosen everything up nicely.
One more aside - if your cast iron rusts it is not ruined - quite the contrary (I pick up these rusted relics at flea markets all of the time for a couple of bucks) - use carbonated soda (Coca-Cola is particularly good, especially since I think that it tastes like malted battery acid and is unfit for human consumption) and a green scrubbing pad to remove the surface rust, and then reseason the cookware. Good as new.
One last thing - I have been told that it is a bad idea to cook both spicy and sweet foods (desserts, etc) in the same pan, even after a thorough cleaning - allegedly some of the flavors are retained in the seasoning in the pores of the pan. I have never noticed it, but thought I should try to be complete in providing information.
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Hannibal