If you don’t have lead splatter, just scrub it well with your favorite detergent, rinse well and then run a tank of Colman through it. Preferably with a couple of cast iron skillets on it and any bad will have to be gone. Lead is not good for health, but we have keep the amount in mind too. After a scrub and a burn, the traces left won’t be of concern. On the other hand, I would never use a skillet I melted lead in again for food.