abrasion
abstract
aluminum
background
blots
brown
chemical
chipped
closeup
corrosion
crack
damage
dark
decay
decline
detail
dirty
dots
grunge
heavy
industrial
iron
material
messy
metal
metallic
old
oxidation
oxidized
paint
pattern
peel
plate
rough
rust
rustic
rusty
scratches
shabby
sheet
spots
spotted
stain
steel
surface
texture
textured
weathered
worn