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 burst button circle collage floral flourish flowers ring Scroll torn vintage washer worn black color feel fire insects nature textures tree wood cog cogs machine mechanic mechanical thing turn wheel decay peeled scratched wall