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 contrast decay painted rusting antislip bright bump-map construction diamond-patterned diamond-plate diamond-sheet diamondplate diamonds grid light non-skid pattern patterned patterns paving sheet-metal surface surfaced surfaces textured textures walkway worn backdrop city decade design metal oxide earth earthy iron oxide laterite Laterite texture Mud rock stone tone uneven