Is there a special filler rod needed for gas (oxy/acet) welding cast iron. The piece in question will be subjected to high temperatures when in use, so brazing is probably out of the question. (gas forge door) Or would I be better off heating it up (relatively small, not thick) and arc welding with high nickle rod? Dave Brown Blacksmith/Tinsmith Green Bay, WI ABANA, UMBA, GoM, MODA, ARG