background city decay ground grunge metal paint pavement rough sidewalk street surface texture urban walk walkway wear worn degrade Denver old oxidation oxide peel rust rusted rusting trash waste wastebin aged debris iron oxidized peeling steel weathered abstract appearance barrier boundary closed color coloration colors colour colours connected divide divided dividing door garage joined light painted plants ribbed ribbing ribs rollerdoor secure security shadows shed sheetmetal strength strong tinted tinting Cleveland Ohio rivet rivets rusty wabi sabi wabisabi