Why not paint your own pictures on these can lids much like people paint saw blades. You might punch holes in designs form. Then use some kind of seal on them reopen the holes .
try hanging them in a window to see if you like it as a suncatcher. Maybe fit it over a some kind of light to show it off against your house, or a corner of a room.
I did this once when I was a kid. I attached the punch hole cat over my flashlight.
Everything has value you just got to want to find it.