What are the conservation challenges for painted stone sculptures outdoors?

Painted stone sculptures displayed outdoors face numerous conservation challenges due to exposure to environmental factors. Weathering, caused by rain, wind, and temperature fluctuations, leads to surface erosion and paint loss. Pollution, including acid rain and airborne contaminants, accelerates deterioration and discoloration. Biological growth, such as moss, lichens, and algae, can damage both the stone and its pigments. Additionally, human activities like vandalism and improper handling pose significant threats. Effective conservation requires regular maintenance, protective coatings, and controlled environmental conditions to preserve these valuable cultural artifacts for future generations.