[dhdallas]

The only caveat to cleaning your car in the driveway is if you use tire shine products. We have a beautiful cobblestone stamped concrete driveway (sealed) at our PA summer home. When I first liberally sprayed a tire shine type product on my tires it dripped from the tires onto the concrete and stained it. Even our gas power washer would not get rid of the brownish marks. It took using acetone & vigorous brushing to clean the spots. So...either don't use it but if you do, wipe the stuff on with a rag or spray it on when parked in the street or in a parking lot at a store.