alloy
aluminium
aluminum
background
blank
brushed
dark
design
dirty
durable
glossy
grey
grunge
grungy
hard
heavy
highlight
industrial
iron
material
metal
metallic
old
plate
polished
reflection
reflective
round
scratch
sheet
shine
shiny
silver
silvery
sleek
space
specular
stainless
steel
strong
style
surface
techno
template
texture
textured
titanium
tough
wall
wallpaper