How to maintain clay sculpture buildings in West Africa?

Clay buildings are easy to build, but they are troublesome to maintain. In the dry season, the local people will smear the stirred straw and soil on the external walls of clay-plastic buildings. Over the years, this large-scale maintenance activity dispatched by the whole city has gradually evolved from simple collective labor to a celebration ceremony. As a result, the ancient buildings have not only been preserved from generation to generation, but also been injected with their own flavor of the times by the restorers of past dynasties, showing strong vitality.