Re: Muriatic Acid for Gas Tank Cleaning
If you want to remove rust from metal use Phophoric acid, not muratic.
Phosphoric acid is sold under the brand name "OSPHO".
It is also found in "Naval Jelly", and "Metal Prep".
It turns the Iron Oxide (Rust) into a hardlayer, that can be painted right over.
It is green in color, and when once treated won't rust again.