How do you clean brick with muriatic acid?
DON’T USE IT STRAIGHT FROM THE BOTTLE! I mix it about 4 parts water to 1 part acid (20% acid) then brush it on. Make sure you wear long sleeved shirt (that you don’t mind throwing away), eye protection and rubber gloves. Also, make sure you have clean water nearby that you can use to rinse yourself off in case you get some on you. That stuff really stings.