Anybody ever use this Alumaloy repair rod
http://www.alumaloy.net/alumaloy1.htm to fix aluminum? It has a lower melting point than aluminum (728F compared to 1220F). They sell the rods on ebay:
http://cgi.ebay.com/ALUMALOY-Aluminu...QQcmdZViewItem for $20 for a 1/2 pound of rods.