Rudimentary Plastic Skull Cutouts

I worked at a Plastic ThermoForming  company on and off in upstate NY for a few years and the second best take-away from there was a bunch of these 1/4" high plates, 1/8th" thick black cut-outs, in the basic shape of a skull.

I scarfed up a very small load of them then.

I painted white acrylic on them back in 2005 or 2006.
I still have them and here is the 1st of them.  This the "inside of the plate painting"
showing the "haircell" texture.