I need to spray/apply some muriatic acid on my tile in a few places to remove some calcium buildup, and I want to make sure that I don't damage the tile grout while doing it. Can the acid/water mixture stay on the tile for a while before rinsing it off, or will the grout start to get eaten away fairly quickly? I'm just wondering, in case some of the calcium is really stubborn and might need acid sitting on it for a while to get rid of it.
Thanks,
Greg
Thanks,
Greg