Originally Posted by lovelesspa
I have been cooking with cast Iron just about my whole life, and have my grandmother Cast Irons, and she's turning 100 in about 2 weeks. The way she told me to do the seasoning is always to use lard (even though I cringe at the thought and feel of it), but it works best, doesn't leavy a sticky feel to the pots. But when your skillets are new you coat the pans with lard, generously, and lace in the oven set at about 300 degrees, keep in there for about 15 minutes. Pour out any excess oil and then place back in over for at least another hour or two. This creates the seasoning bond. Every time you cook in the beginning you should try and use food with high fat content, like bacon or foods cooked with fat cause this will also strengthen the process in the beginning.
If rust appears it has not been seasoned properly or needs reseasoning, or it has wore off from foods sticking to it and need to be reseasoned. When this happens wash thoroughly with hot water and a soft scrubbing pad (the plastic kind), dry quickly with a paper towel and reseason. (Cleaning while the pan is still hot makes cleanup so easy, but don't use a scouring pad, like brillo or a hard detergent, cause this is what causes breakdown in seasoning) She told me not to use detergent in general, but I use a minute amount of a light detergent, one that doesn't contain bleach or hard core antibacterials solutions, something like Ivory. I love them and wouldn't cook on anything else, you get real use to them, quickly.