Why do restoration professionals get so many calls regarding spills of the wrong product or scratches inadvertently caused by some other repair or attempted repair? It happens all of the time. Really, all they can do is to say thank you because you are providing them with the business. How many maids or homeowners have been using vinegar to remove minerals from their black marble shower, only to have the polish dulled because of repeated exposure to mild etching over a period of time? I have...