A guy that I am helping fix is RT100 motor says he has used electrolysis to remove rust in a gas tank?? Anyone ever heard of this?? Says he uses a car battery charger, some Arm and Hammer detergent/water mix in the tank and some metal rod inserted through the gas cap. Process takes a couple days but he says the inside of the tank will be like shiny new when finished?? He is going to do this to my 73 MT250 tank. So we shall see????