abstract
aged
artistic
backdrop
background
blank
brown
corroded
corrosion
damaged
design
dirty
effect
faded
frame
green
grunge
grungy
industrial
industry
iron
material
messy
metal
metallic
old
oxidation
patina
pattern
plate
retro
rough
rust
rusted
rustic
rusty
sheet
stain
steel
structure
surface
texture
textured
weathered