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Old 09-21-2010, 05:07 PM   #12
Flat Ernie
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Default Re: Muriatic Acid for Gas Tank Cleaning

I use muriatic acid to get deep rust off. Neutralize and flush. Then a phosphoric acid rinse. I rinse with denatured alcohol to get the "dusty" / "flakey" phosphoric acid residue off.

Also, denatured alcohol is very good at removing gum in tanks - not much will touch it - even acetone seems to have limits working against gum and varnish, but denatured alcohol seems to work pretty well.

I do all my tanks, even new, with phosphoric acid...and don't use sealers.
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