Painting - painting a cinder block wall

I'm going to paint a retaining wall in my back yard, a part of the wall is painted gray and another part is unpainted. both portions have little sopts on moss.......are ther any tips to ensure the moss does not return and is there a special paint for concrete or cinder block???

thanks

The moss needs to be addressed first. Clean it with a solution of bleach and water, rinse well. The unpainted block should be primed with block filler. This will alow the finish coat to cover and not soak in and disappear. You can add mildewcide to the paint to help ward of the return of the moss. It is probably being caused by vegetation growing close to the wall and not allowing it to dry. Any good exterior latex is good for finish coat.

Yep, what he :thumbup: said.