The coated tanks I drained, took off the truck, removed the pumps, and strapped in the back of my daily driven pick up. Oh yea, I put 2 gallons of Toluene in them and drove (sloshed) around last winter for 2 days. Then disposed of it properly at a body shop. Clean as a whistle. Toluol may be the other name for it. It is an industrial paint thinner. Used to be in old carb cleaners a few years back.
Sounds like a good solution. Here are a couple of notes I found on wikipedia:
Toluene is a common solvent, able to dissolve paints, paint thinners, silicone sealants,[9] many chemical reactants, rubber, printing ink, adhesives (glues), lacquers, leather tanners, and disinfectants.
Toluene can be used as an octane booster in gasoline fuels used in internal combustion engines. Toluene at 86% by volume fueled all the turbo Formula 1 teams in the 1980s, first pioneered by the Honda team. The remaining 14% was a "filler" of n-heptane, to reduce the octane to meet Formula 1 fuel restrictions. Toluene at 100% can be used as a fuel for both two-stroke and four-stroke engines; however, due to the density of the fuel and other factors, the fuel does not vaporize easily unless preheated to 70 degrees Celsius (Honda accomplished this in their Formula 1 cars by routing the fuel lines through the muffler system to heat the fuel). Toluene also poses similar problems as alcohol fuels, as it eats through standard rubber fuel lines and has no lubricating properties, as standard gasoline does,[citation needed] which can break down fuel pumps and cause upper cylinder bore wear.
Toluene had also been used in the process of removing the cocaine from coca leaves in the production of Coca-Cola syrup