Q:I replaced one-fourth of a concrete driveway when a new water line was installed. That section is white, the older sections gray. It looks awful. If I paint the concrete, I can imagine chipping and ...

We have a large, dark stain on our living-room ceiling that I believe to be caused by water. What can we do about this? Is there a cleaner that will remove it? A If you haven't found and fixed the ...