Allow the acid* to work half-hour (or right up until the fizzing stops) after which flush with drinking water to remove the salts formed with the acid* reacting With all the concrete. Using a mop to apply the acid* isn't going to provide a reliable etch. Be aware: Depending http://devinpqomj.blog5.net/22770806/the-2-minute-rule-for-prep-garage-floors-to-paint