In my personal watercolors I apply a thin layer of acrylic
modeling paste using a palette knife. After it drys I paint over
it with transparent watercolors. I believe it would work for your
project. I'm including links to paintings where you can see it.
> Oh wise ones,
> We just finished building three dimensional cardboard sculptures (my fifth grade students). We want to finish them with a textured paint so thaey look as though they're made of stone. I tried adding sand to tempera paint and painted a demo piece. It's cracking slightly in places, but my bigger concern is that as it's handled, the sand seems to be rubbing off. Can I seal them with something or use something else entirely?
> Jill in Colorado