Gas tank varnish

[tinkirk]

Originally Posted by BRENT in 10-uh-C

Order Sodium Hydroxide (Caustic) from a vendor such as Soapgoods and mix it up with water. This is what the radiator shops used some two decades ago and before to dissolve organic matter inside of radiators & tanks. Hot (--or warm) Caustic makes a great product for removing grease on Model-A parts.

I used E85 to take care of gas that had been in the tank sense 1965 worked good
Good luck
Tinkirk/Terry


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