Just be watchful when using cast iron. It's can crack while heating to temps high enough to melt lead. One guy I know apparently had 40 pounds of molten lead spill onto his backyard patio. Although no one was hurt, his wife was not pleased.
IKEA sells some nice thick stainless steel pots at pretty good prices. They have tight covers too which come in handy for that ... err... smelly part with wheel weights.