Cleaning Gas Tank

[JOSEPH MATO <joemato@sbcglobal.net>]

Muraitic acid is good for eating rust (and metal), but doesn't etch the metal  
which phosphoric acid does. I wouldn't use either in an enclosed space and use 
plenty of hand and eye protection especially with muriatic, its wicked. 
Phosphoric acid is part of the POR fuel tank cleaning kit.