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Untreated cast iron rusts, especially around water.To prevent metal from oxidizing in the presence of moisture, cast iron requires a process called ? seasoning?.Seasoning is simply the procedure of baking oil into the oven's pores, and on top of the iron pores.This baked on coating will darken and eventually turn black with age.Darkening is the sign of a well kept oven, and of it's use.This coating forms a barrier between moisture in the air and the surface of the metal...