As long as a piece of the brass is touching any raw aluminum, the process will work. If not, then jam a piece of aluminum wire down beside the broken metal and attach the power supply to that point.
Originally Posted by Spider-TW
The process won't hurt the aluminum valve or strip the anodize. It is the anodize process. If anything, it will strengthen any weak or exposed anodize areas. It will however, kill any other metals that can't grow a protective oxide layer.
Except for the Automag in front, its usually the man behind the equipment that counts.