abstract
background
brown
construction
copper
corrosion
crude
damaged
decay
destruction
detail
dirty
grunge
grungy
industrial
industry
iron
material
messy
metal
metallic
old
oxidation
oxidized
panel
pattern
plate
ragged
rough
rust
rusted
rustic
rusty
shape
sheet
simple
slab
space
spotted
stain
stained
steel
surface
texture
textured
vintage
wall
weathered