Hot (hot, hot water) water and Red Devil Lye will clean a tank like new. It neutralizes rust and turns it into a black carbon looking slime which can be rinsed off as well.

Lee


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1965 Chevy C-10 Gallery page
My Chevy truck pages more info and pictures!
1961 Studebaker Hawk
1962 Shasta 16' AirFlyte Travel Trailer
1941 Case Model S tractor