abstract
alloy
aluminum
backdrop
background
black
brown
brushed
chrome
damaged
dark
design
dirty
gray
grey
grunge
grungy
heavy
industrial
industry
iron
material
metal
metallic
modern
old
pattern
plate
reflection
retro
rough
round
rust
rustic
rusty
scratch
sheet
shiny
silver
stainless
steel
surface
texture
textured
used
vintage
wall
wallpaper
weathered
white