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I have used the muriatic acid on small parts and it works great. I rinse it well afterwards with water. I would not use the stuff on a large scale because it is nasty to work with and sure hurts on the skin. Buy why not just neutralize the parts with something like baking soda afterwards? Baking soda and an extra bucket are cheap.



Muriatic acid is too dangerous and agressive for me to use it comfortably. With the vinegar/lemon juice/salt mix I dont have to wear rubber gloves, be particularly concerned about splash or using it in an enclosed area. Disposal is not an issue for it either.
I make a 3-1/2 gallon batch for under $10. Lasts for months.