White Chalky Buildup on Prop and Shaft

[Natedogg]

Months later and the buildup has not come back so it looks likes tying the binding wire into the negative node of the battery did the trick. I thought the bonding was supposed to be an independent system, but I guess not. Appreciate everyone's input on this one. Starting up a new thread now about A/C fires and how I may be the luckiest guy alive 😬