I don't know where your mechanic received his
training, but have you ever heard of flash rust, ask
any machinist about what he does to metal after he
cleans it, it is immediatey dried and covering with a
rust inhibtor. Flash rust will occure on any cleaned
exposed metal, why didn't you have the tank treated
with a sealer so the rust would stay away. I clean my
own and use acid and the POR-15 gas tank sealer
treatment and have not had any problems with any of
mine that have been treated. Phil

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