In article , "Bob F"
wrote:

My suspicion is that they just skipped the step where someone went into the
CAD
files generated in the scan to refine the unseen elements before printing.

Agreed. Jay Leno - a guy I don't like mostly because he doesn't seem to
realize that he looks like a freak from another planet (if he realized
it I'd be OK with it) - did an episode of Jay Leno's Garage featuring
this technology, and ISTR they had to touch-up the scan. He was making
"otherwise unobtainable" parts for antique cars with it.