abstract
aluminium
aluminum
background
bright
brushed
chrome
closeup
design
diamond
diamondplate
durable
floor
gray
grey
grungy
hard
heavy
industrial
industry
iron
ironworks
macro
material
metal
metallic
panel
pattern
plate
polished
rough
rugged
sheet
shine
shiny
silver
silvery
stainless
steel
strong
surface
texture
textured
tough
wall
wallpaper
weathered
worn