Palmer Brothers has a long history of successful cleaning of surfaces previously thought to be permanently damaged. Utilization of water and acid based products requires an experienced individual and steady hand. Using the wrong chemical with the wrong PSI (Pressure per Square Inch) will result in further damage to your structure. So you need a Palmer Brother professional to ensure that your building, deck, garage, roof, warehouse is properly cared for. We have an extensive list of satisfied customers managing residential, commercial and historical sites.