What does Weld-On 4 NOT stick to?

[evermorian]

I just set these on a concrete paver and applied the Weld-On with a needle applicator:

Acrylic Inlay Knotwork Butterflies

[ACrawford_20181216_0003] [ACrawford_20181216_0011] [ACrawford_20181216_0016] This is an acrylic inlay experiment with one of my knot work designs. Bottle cap for scale in one shot. They are about 2.5" by 2.25". These are intended to be pins but, my backs disappeared. I am waiting on more to arrive. They are possibly too plastic-y for anyone to want to actually wear. Maybe beveling the edges would help? The outer frames are frosted acrylic in “cherry blossom” and “kiwi,” while the inlay…