Cameron DeMille
Member
For porcelain with sanded grout, we use a Malish 180 grit brush. It will scuff up the grout a little. not enough to damage it, but it will scrape the top clean, rather than the grout wearing out the brush.
Hello Marty, what machine are you using these days? How hot does it get and what chems and dwell time are you using to get these miraculous results? Do you mix your chems with cold or hot water? What kind of sprayer? How do you get the edges? What tools or rotary do you use? Do you wipe up the edges kneeling or standing up? Air mover to dry or not? That's a start. Anyone else have a question for Marty?I can't think of the last time I've had to scrub a tile job. The one it did Friday had an 8th of an inch of black crud on the grout.