aged
alphanumeric
ann arbor
background
black
bold
closeup
contrast
detail
durability
eyelevel
functional
grunge
history
identification
industrial
industrialpurpose
metal
metallic
metallicbackground
michigan
object
obsolescence
passageoftime
resilience
sansserif
sansseriffont
scratchedsurface
stencil
surface
tear
texture
texturedsurface
usage
wear
weathered
weatheredmetal
weathering
worntexture