We really don't know whether Emony or Torias had spots to begin with...
We know Emony Dax was on Earth and passed for somebody Earthlings would welcome in their Olympic Games and McCoy would subject to his surgeon's hands. But Dax might have been wearing a body that did not differ noticeably from those of Federation member species - either as a deception, or because Emony always looked like that.
As for Torias, what makes us think that he would have been in Starfleet? Merely the fact that he did space service of some sort, flew shuttles, fought battles? That need not have involved Starfleet in any way.