abstract
alloy
aluminum
background
banner
board
border
construction
copy
dark
design
dirty
frame
gray
grunge
grungy
hard
heavy
industrial
industry
iron
layout
line
material
metal
metallic
old
pad
panel
pattern
plate
polish
rough
rust
rusty
sheet
shine
silver
space
stainless
steel
surface
tablet
template
texture
textured
tough
wall
wallpaper
weathered