Hi. What do you use to remove dirt, road film, carbon exhaust from surfaces? A hotel on a very busy street would like their walls cleaned from the ground to approx 10ft. high. The walls consist of painted wood and some stucco. There is no mildew or algae. There is plenty of dirt and road film. I have had trouble finding a product which lifts dirt easily. I am trying, if possible, not to have to brush the entir surface. I need some advice. Thanks,
Mark, La.
Mark, La.