Jon, very interesting experiment.

The hatched lines I'm seeing in the pictures

are they the layer lines you are talking about?

  Silver and chromes are going to amplify them

tremendously. Are they more like a scratch in the surface. Fairly consistent across the casting

(Sample)? Are something that is supposed to part of the lens?

  3D printing, I know what it is, I've never seen a finished piece in real world.

  I'm assuming all the under coats, color coats and clears are lacquer based?

  Do you have any spares or cast-offs, where i

might try to eliminate them? Yeah, a couple

squares would be cool. I got more questions myself.  Could send them back let you evaluate them. See what you think.