brown corrosion decay doom ferrous grain grey grunge iron oxidation oxide oxidise quake rough rust rusty steel surface texture textures abstract aged aging background chemical corroded damage damaged dirty distressed frame grungy industrial industry metal metallic old paint peel peeling pitted plate reaction red retro rusted scrap stain stained urban weathered weathering abandon abandoned antique backdrop black blue copy corrode cracks derelict erosion ferric ferro flake flaking neglect neglected orange patina peal pealing scratch scratched scratches space vintage white damage damaged hull macro