Can the special armors be mixed? That is, can you load up on Emissive or Organic Armor, but then just put on one Stealth Armor, and get the full benefit of the stealth? Or put one one stealth plus one relective (or what ever it is called) and sum the defense bonuses? Or if you put on a bunch of Organic, then a single Emissive, will you dismiss all damages < 10?
Short answer: Yes, you can mix and match armor. The defensive bonus from Stealth and Scatter armor are not cumulative with other pieces of the same armor. However, IIRC, the bonus from Stealth and Scatter do add together.
If you want more information on how armor and damage works, see the topic "Armor, Shields and Damage (FAQ)" and the correction to that post.