abstract
aged
alloy
aluminum
background
border
break
concrete
construction
copyspace
corroded
corrosion
crack
crumpled
cut
damaged
eroded
faded
fence
fracture
frame
futuristic
galvanized
grunge
grungy
industrial
industry
iron
material
metal
metallic
old
polish
rip
rough
rust
rusted
rusty
scratched
shaggy
sheet
silver
split
steel
structure
surface
template
vintage
weathered
zinc