Hutchesons Grammar school in Glasgow recently had a new drama building built, and we were approached by the contractor to give the building a washdown before hand-over. The bricks were patchy in areas from mortar smears and staining and there were some heavy mortar splatters. We hired a scissor lift and gave the whole building a light chemical wash which cleared up most of the smears and made the whole building look uniform, then we just chipped off the heavier chunks and gave the bricks a final rinse down. We were then asked to give the surrounding slabbed walkways a clean after all the scaffold and materials were removed. Whole thing came up great and was handed over a week later!