Cleaning rust from inside of tank...chemists step inside;)
I have about 3-4 gallons of Hydroflouric (sp) acid left...we used to mix this with water in a weedsprayer and spray on all my dads polished Aluminum on his Peterbuilt...let it sit a bit, then rinse off.
Anyway..it's labled as "Aluminium Brightener" the jug says "mix up to 50-1"...it also says does not exceed 60% strength (I take this as it sits in the jug).
Anyway, thought on using this to clean the rust inside a fuel tank?
I'd thought about mixing it maybe 20 parts water, and 1 part of the solution (would actually be about a 40-1 mix of water to HF).
Thoughts?
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