You could use any kind of acid, the stronger the better, but the stronger, the more dangerous.
So safety glasses, and do it where there is plenty of ventilation, if you try strong acid, like battery acid. Lemon juice has a pH of 4 or less.
So safety glasses, and do it where there is plenty of ventilation, if you try strong acid, like battery acid. Lemon juice has a pH of 4 or less.
