Hi! This may be getting way ahead of things but speculating is fun. It occurs to me that SLS is being used to fabricate materials with interesting optical effects like structural color generation in the form of diffraction grating. See e.g. http://www.opticsinfobase.org/view_a...bile%3Dno&org=

Could the peachy or a modified version ever achieve the resolution necessary?

Cheers from Norway!