Acid core solder would be even better than brazing. The lower the temperature used to apply the patch material the better. Maybe the silver solder used to assemble HVAC units would be a good compromise, at least for a temporary fix.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!