Rust bluing solution DOES contain noxious chemicals, if you are using the Herter's formula now sold by others it contains MERCURY. Rubber gloves, good ventilation and a quality respirator should be used when rust bluing especially when carding. I worked in the gunsmithing department at Browning Arms Co. for many years, during this time some of my coworkers developed health problems from exposure to the hazards involved in rust bluing. Rust bluing in the home kitchen exposes you and your family to these hazards and I would strongly advise against it.
Last edited by gunswizard; 01/07/12.
