Rusty Tank - vinegar

[ctk]

I'm gonna try the oxalic method. Does anybody coat the inside of the gas tank after every step is done? I keep my tanks full of gas all the time and use a stabilizer to help with water. How bad will the acid eat the outside paint off? I'm thinking of painting the gas tank so might kill two birds with one stone. Otherwise I'll just fill the gas tank up and not soak the entire tank.

[captainweezy]

Make sure to rinse with baking soda after the vinegar is out or it will flash rust rapidly

Is there a ratio with the baking soda? I am cleaning a few as we speak.