Choose a sculpture that has some cracks in it. Keep in mind that resin statues are not suitable for covering with moss. Cement, on the other hand, works well.
Mix a fist-sized chunk of porcelain clay with three cups water until it turns into a paste. Clay can be found at most local craft stores.
Add fish emulsion and one cup of moss to the paste and mix thoroughly. Fish emulsion can be found at most local garden centers. Moss should be as free of dirt as possible.
Cover the sculpture in the paste by "painting" it on. For people who don't mind getting messy, spreading the moss on the sculpture by hand is often easier and quicker than painting it on with a brush.
Place the sculpture in a shady area of the garden, out of direct sunlight.