We have a bluestone letterbox at our house with a giant white spray painted number on the front. Admittedly, the number is not "graffiti" as such, but is offensive to our eyes and is often the first thing people mention when visiting us, which we would like to change!
Has anyone got any hints or tips for removing spray paint from bluestone that hopefully will not ruin the surface? I have heard of the graffiti removal products, but I am not sure they would work for bluestone.
