A lightly sandblasted architectural wall looks much the same as a paper face wall, with some cement paste removed to reveal the sand fines. It should not be confused with sandblasted exposed aggregate walls, as listed below. Light sandblasted walls can be achieved with, of course sandblasting, but also can be obtained through high-quality concrete retarders. These concrete retarders are applied before the wall is assembled, and they retard the surface of the wall permanently, so the wall can be washed later. This method is desirable when sandblasting is not practical.