abstract
aged
alloy
backdrop
background
barrier
black
blue
brown
construction
copper
cyan
damaged
decay
detail
dirty
fence
frame
grain
grid
grunge
heavy
industrial
iron
material
messy
metal
metal texture
metallic
obsolete
old
paint
pattern
plaque
plate
rough
rust
rusted
rustic
rusty
rusty metal
scratch
sheet
spot
stain
steel
surface
texture
wall
weathered