Graffiti at the MSA

Agh, this sucks so much. After paying a fortune to coat the Merdado San Agustín in "Graffiti Coat" the product failed us and the graffiti is not coming off. After many fights with the manufacture we are still in a battle over responsibility. But most likely we will have to replaster the entire West side of the building. Our policy is to remove it as soon as it happens but as you can tell we can't get it off.