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 black bleak concept creation dark death decay design fill gloomy graphic illustration image machinery mottled New original oxidisation oxidised render ruin scrapbooking sepia steampunk style ugly unique vector very hi res