when i refer to stucco i dont mean the stucco from years ago, i mean the new stucco with the styrofoam behind it. it seems where i live its being put on a lot of buildings and houses. it gets dirty very fast and seems to be extremely hard to clean. i have tried all sorts of soaps, etc, but the stucco seems to remain stained. is there anything that may work that i might not have tried already?