This is awesome. Just what I'm looking for. I picked up my 1969 CA160 today and the inside of the tank is in great shape except for a couple rust bumps on the outside edges/bottoms (can't describe it). I need to do use one of these methods.
Question, though. Let's say I clean the tank of rust, then empty it and don't fill it for a year. Will I need to perform this task again at that point?
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