abstract
alloy
art
background
banner
bar
blank
board
border
brushed
construction
dark
design
dirty
frame
grunge
hard
heavy
industrial
industry
iron
layout
material
metal
metallic
old
panel
pattern
perforated
plaque
plate
polish
rough
rust
rusty
screw
screws
sheet
shine
shiny
smooth
space
stainless
steel
surface
template
texture
textured
wall