They certainly aren't pinholes. The castings made by Olav from Reality in Scale are flawless in that area.
He uses a resin that resembles stone when cures. Like Anders said, a couples of washes and you could be done. I did ask him a couple of times about the brand he uses, but Olav guards his...
Hei John,
eindelijk kan ik ook reageren!
I've seen this figure for real, and it's even better than in the pics. And the other one that's nearly done looks as good as this one. Post the pics as soon as the little details are in place!!
Groet,
Theo