These are before pictures of a house we cleaned the brick that had oxidized behind the shutters in Kettering.
These are pictures of our work in progress. This is a tedious removal process with multiple applications of our cleaner that we use.
These are the results after our final application. Please keep in mind that this was cleaned using just an oridnary garden hose. Do not let anyone use pressure to clean this off as it may cause damage to the joints and mortar.