I noticed a thread recently about cleaning and it was suggested that elbow grease, no don't laugh , is very good stuff. I wonder if this is suitable to be used in ultrasonic tanks. I believe it is a citric acid based chemical pretty dilute I would imagine with some sort of soap chemical added but I don't know. Any advice or comments.
I am planning to use it to clean small instruments like speedometers. I use ultrasonics in my clockmaking work but with different chemicals, I would like on that is a bit easier to dispose and is not too damaging to the environment. and that works, quite a big ask.