abstract
aged
alloy
backdrop
background
black
brown
brush
copper
corrosion
corrosive
damaged
dark
design
detail
dirty
fence
frame
grunge
heavy
industrial
industry
iron
material
metal
metallic
old
orange
oxide
oxidized
pattern
plate
protection
red
retro
rough
rust
rusted
rustic
rusty
sheet
stain
steel
surface
texture
textured
time
vintage
weathered
worn