abstract
aluminum
antique
background
black
bright
chrome
cold
damaged
decorative
design
dirty
effect
floor
gray
grey
grunge
grungy
heavy
industrial
industry
iron
junk
material
messy
metal
metallic
old
pattern
plate
rough
rust
rusty
scratched
seamless
serious
sheet
shiny
spots
stain
steel
strength
structure
surface
texture
textured
uneven
wall
wallpaper
weathered