Depending on the finish, contaminant, and the extent of the soiling, cleaning is done in a variety of ways. Polished surfaces clean easily, usually with water and a sponge, while irregular surfaces, such as rock pitch, are more difficult.
Crevices provide a good place for living organisms such as molds and mosses to grow, and you may need a plastic brush to remove such organic growth. Do not use ferrous tools such as wire brushes, since residual particles and even tool contact with the memorial can produce permanent rust stains. Any solutions used must be rinsed thoroughly from the memorial. Memorial cleaning is available from Woodside, and is recommended for memorials with a large buildup of organic growth on them.