alloy
aluminum
background
brown
brushed
closeup
corrosion
damage
dark
design
destruction
dirty
effect
green
grunge
grungy
heavy
housing
industrial
iron
lock
macro
materials
messy
metal
metallic
noise
nut
obsolete
old
paint
peel
rough
rust
rustic
rusty
scratch
spotted
stained
steel
surface
textured
trash
uneven
weathered
yellow