Well my 2nd model has arrived, and I love the appearance after painting it. I applied a single coat of acrylic paint with a metallic finish - no primer was necessary. Quaternion Julia Set The mesh was generated by a custom C# program and then cleaned up a bit using Blender. Frankly I could go broke printing all the fractals I'm interested in... I've love to set up a shelf or two with nothing but mathematical art. The biggest challenge I encountered was generating a nice mesh from a 3D isosurface which doesn't exceed the maximum number of vertices... I'm using a marching cubes algorithm for creating the mesh, and one of the downsides is that it uses the same vertex density all over rather than where you really need the detail.