My project is a chess set (one half) made out of mild steel, turned on a lathe. They're slowly forming an undesired rust layer. I want to preserve the look and feel, and coat them in something to protect the piece from rust, and from grubby fingers whilst I play chess against my kids. I don't mind the idea of the black patina, however, you mentioned it is poisonous, and that doesn't go so well with kids. How can I preserve my steel chess set?
The black patina is only poisonous in its liquid form. After it is applied to the steel and rinsed off only a black oxide is left on the metal. For the safety of youngsters, I’d only apply the gun bluing outdoors when they are sleeping or away. Maybe store the bottle offsite somewhere else if need be.
As far as protective coatings, I’d go over it with 3 coats of lacquer. Reapply that every 6 months as needed.
Updated on June 3, 2020