I've found the following chemistry from a German classic oil supplier I've started using.
I have read the warnings and instructions and it scares the crap out of me.
I could so easily ruin my tanks external paintwork.
So I may ask my landlord if I can borrow his cement mixer and find a load of ball bearings or nails to tumble the tank clean.
Organic cold stripping product specifically developed to remove coatings/sealers inside tanks. Tankex removes old Sealers Many tanks have been…
www.classic-oil.com