abstract
alloy
backdrop
background
black
blank
chrome
construction
dark
design
dirty
galvanize
galvanized
glossy
gray
grey
grunge
illustration
industrial
industry
iron
leaf
material
metal
metallic
old
panel
pattern
plate
reflect
reflection
roof
rough
rusty
scratch
sheet
shine
shiny
silver
smooth
stainless
steel
surface
texture
textured
tin
wallpaper
white
worn
zinc