abstract
aluminum
background
chrome
chromed
construction
corrugated
detail
fence
foundry
galvanize
galvanized
geometric
gray
grey
grunge
grungy
hardware
industrial
industry
iron
lines
material
metal
metallic
old
panel
pattern
plate
row
rust
rusty
scratched
sheet
silver
stainless
steel
striped
strong
structure
surface
texture
tiling
tin
wall
weathered
zinc