abstract aged aging background brown chemical corroded corrosion damage damaged dirty distressed ferrous frame grunge grungy hull industrial industry iron macro metal metallic old oxidation oxide paint peel peeling pitted plate reaction red retro rough rust rusted rusty scrap stain stained steel texture urban weathered weathering ancient antique architecture backdrop barn battered black building copy copyspace crack cracked decay decayed derelict dereliction effect element exterior outside peeled rural scratch scratched space structure textured wall wallpaper weather white wood wooden yellow