At 4:24 P -0600 3/28/08, Chris Robison wrote: >that converts rust into an inert oxide Or iron. Fe2O4 + 2C -> 2CO2 + 2Fe We used to scrape a briquette onto a very hot rusty skillet to restore the metal. Then we'd wipe it with a little oil and it was ready for pancakes. There must be some chemical that can reduce Fe2O4 without heat. --Gil