What are the differences in graffiti resistance between polished and rough stone?

The resistance to graffiti differs significantly between polished and rough stone surfaces due to their distinct physical characteristics. Polished stone, with its smooth, non-porous, and sealed surface, generally offers superior graffiti resistance. The glossy finish prevents spray paint and markers from penetrating deeply, allowing for easier removal with appropriate cleaners without leaving permanent stains. The tight surface structure acts as a barrier. In contrast, rough stone surfaces like flamed or bush-hammered granite have a textured, porous, and micro-fractured finish. This roughness provides more surface area for graffiti materials to latch onto and seep into, making complete removal challenging. Paints can become trapped in the crevices, often requiring aggressive cleaning methods like pressure washing or poultices, which may alter the stone's appearance. While sealers can improve protection for both types, the inherent smoothness of polished stone provides a fundamental advantage. For high-vandalism areas, polished finishes are typically recommended for easier maintenance, whereas rough finishes may require more intensive and potentially damaging cleaning procedures to restore their original state.