Specialized Vandalism Remover for Natural Stone & Historic Sites

There's a clear need for a specialized product or service to remove paint vandalism from natural, historically significant stone (jasper, hematite) without causing damage. Current suggestions (pressure wash, Krud Kutter) might be too harsh or require specific equipment not always available for delicate sites. A gentle yet effective cleaning agent or a professional restoration service specifically designed for removing various types of vandalism (paint, graffiti) from porous natural stone, ensuring preservation of the material's integrity and aesthetic, would fill a niche for preservationists, park services, and private landowners.