abstract
alloy
aluminum
armoring
backdrop
background
blank
board
border
brown
circle
copy
design
frame
gray
grunge
hard
industrial
industry
iron
ironclad
layout
material
metal
metallic
old
pattern
plate
riveted
rust
rusty
scratched
scratches
sheet
silver
space
square
stainless
steel
surface
text
texture
textured
tile
wall
worn