My grandmother had a couple of sayings meaning that she needed to stop chatting and get on with some chores. One was "This won't get the babies bathed.", the other was "This won't get the range black leaded". In her younger days most people would have cooked on a coal fired, cast iron cooking range which needed treating with black lead to stop it from rusting. Apparently black lead is just another name for graphite but does anyone know what form this came in? Is there a more modern substance for treating iron hob surfaces?