brown color colors colour colours corrosion decay deterioration golden orange rough rust rusty surfaces textures uneven variations wearing weathering abstract aged angles appearance background beam beams bolt bolted connected cracked cracks damage damaged deteriorating grained grains gray grey joined lines maintenance old patterns rustic surface surfacing texture textured timber weathered wood wood-grains wooden woodwork worn architectural architecture basic bricks colored coloured exterior external large-bricks painted smooth solid standard strength wall wallpaper yellow brick-wall green