aged
aluminum
antique
backdrop
blank
brown
business
chain
chrome
closeup
construction
corroded
corrosion
damaged
detail
dirty
element
engineering
equipment
grunge
grungy
heavy
industrial
industry
iron
line
metal
metallic
obsolete
plate
reinforcement
retro
rod
rough
round
rusted
rustic
rusting
scratch
scratched
stack
stain
stainless
strong
structure
surface
technology
textured
tool
weathered