Perry, I saw you stacked and carved the foam - then did you spray on insulating form and carve that too to get the swirls?
Doug,
What you see now is just carved foam with my kitchen knives. The foam spray idea might work very well, but I’m sticking to what I know for now. I’ll coat the foam with Durham’s water putty and as the foam balls vanish after many coats, the correct texture will begin to show itself.
Somewhere on the layout you should put that weird rock formation that used to appear in all those tv shows back in the 60’s and 70’s, esp the episode of the old Star Trek where Kirk and the lizard man fight it out in hand to hand combat (Gorn?)…