just finished cleaning up some rusty old castings with Kano exrust. It is a coal fired water heater that has been kicking around the shop and sheds for twenty years. Now it's painted nicely and good to go as a "kitchen ornament".
I made up about 10 gallons of Kano exrust and water at 4:1 mix.
question: Does this stuff (phosphoric acid, I believe) depleate with use, or just keep going? Should it be saved? or pitched?
Sure cleaned up those castings nicely!
It will deplete, but I doubt you are anywhere close to it, so you probably want to save it.
Originally Posted by CalG