Jareth's head has thin resin in several places. I understand the thin resin in the temples and under the cheekbones: those are places where I made his sculpt particularly indented. As I've mentioned earlier, though, there's also extremely thin resin in his eyewells. as indicated by the triangle, it's the thinnest area in his head. I blame that on Angelsdoll's "inner part modeling" and their known history of thin resin in their sculpts.
I'm trying to fix it by painting the inside of the eyewells.