abandoned
abstract
aged
backdrop
background
black
brown
copper
corroded
corrosion
crack
damaged
dark
design
dirty
fence
frame
grunge
heavy
industrial
industry
iron
material
messy
metal
metallic
old
oxide
oxidized
paint
patina
plate
protection
ragged
rough
rust
rusted
rustic
rusty
scratched
sheet
stain
steel
surface
texture
vintage
wall
wallpaper
weathered
worn