abstract
alloy
aluminum
art
backdrop
background
black
board
border
construction
copy
design
dirty
frame
gray
grid
grunge
hard
heavy
industrial
industry
iron
layout
line
material
metal
metallic
old
panel
pattern
plate
polish
rough
rust
rusty
sheet
shine
shiny
silver
space
stainless
steel
stripe
surface
tablet
template
texture
textured
wall
wallpaper