Re: Cleaning Gas Tank 'in place'
The 2 biggest issue that we have personally experienced is that the Hydrochloric acid tends to be tough to neutralize unless it can be pressure washed and/or scrubbed away. That is tough in a tank where you cannot access the inside. I cannot even begin to tell you how many Model-A tanks I have received where the owner admitted they tried Hydrochloric acid first. Then after awhile, the sealer starts to dislodge from the tank due to rust below it and it gets sent to us. Then when we open the tank, the metal is usually eaten away by the lingering acid rendering the tank useless and too far gone to repair.
The second thing we have found is tanks that are partially coated with sealer are just the same as not coating one because the fuel sloshing tends to erode the edges of the sealer, AND it allows air to enter causing rust. Therefore, for a tank with baffles and one that is still mounted inside the body, it is going to tank 10-11 gallons of sealer to totally fill the tank to ensure it is completely coated. With sealer running around $100 a gallon, spending $1,000.00-$1,100.00 on product seems like an expensive way to shortcut properly restoring one. Then ....and you are hoping after spending that kind of money that all of the rust has truly been eliminated and it doesn't come back! If so, that is a lot of time & money wasted!!
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