Hello,

Just to inform you that using caustic soda offers no advantage whatsoever over your basic washing soda when it comes to the rust removal process via electrolysis. The "soda" is only needed to improve conduction and the washing soda does just that. Using caustic soda develops toxic fumes to a certain degree in the process, it is more expensive (when using large quantities), it is dangerous to skin and eyes and if you're a tree-hugger, is bad news for the environment.

Just my 2 cents

Greetings,

Marco