I've seen pics on this site where some of you have planted vines, etc along your block walls. I've tried different plants and vines and they just burn up. Would it help to paint the wall? If so what colors reflect the heat well. When I get near it I can feel the heat that's built up in it. I'd like to grow some vines on it. I've built trellis and put them out about a foot from the wall but still too hot. Any suggestions?