That's awesome that you use cast-iron as well ! All of mine have been scavenged here and there from yard sales. Well, except the dutch oven... I "borrowed" that one from my parents when I moved out and luckily they've never asked for it back : )
My MIL has been banned from my kitchen b/c while I was in the hospital giving birth to my son she decided to clean my kitchen and that included taking soap and water to my cast-iron !! That combined with the fact that she opened up my yarn swift and hung wet laundry from it almost got her banned from my house.