Anybody ever had a gas tank brazed or welded locally ? I know this is can be done but probably require inert gas and/or purging. tank was lined with POR-15 years ago but is showing signs of needing another repair. I had a similar job done years ago by a radiator shop on a truck tank, but would prefer to go with somebody who worked on motorcycles regularly. Any recommendations much appreciated. I'm in the south bay. thanks