alloy
background
banner
bar
board
border
brand
bronze
brown
construction
copper
crude
dirty
frame
framework
gold
golden
grain
grunge
grungy
illustration
industrial
industry
iron
ironworks
layout
line
metal
metallic
old
panel
pattern
piece
plaque
plate
row
rust
rusted
rusty
shape
sheet
sign
slanting
stainless
steel
template
texture
time
tin
wall