Szerelmey were recently engaged to carry out emergency cleaning works to the Great Hall foyer of King’s College London’s Strand campus, to remove extensive graffiti. Our specialist cleaning team received a call from the University on a Thursday afternoon, on Friday we carried out a survey and sample cleaning, and then completed the works over the weekend. By the Monday morning all trace of the vandalism had been removed and the stonework returned to its original state. During the sample cleaning the team found the spray paint was chalk based and so resistant to a poultice. Instead the team used an acetic acid mixture to wash down the stonework, without over-cleaning it.