Mace & Pepper Spray Part 2

Another issue with carrying Mace or Pepper Spray:  some people aren't affected by it.  You can hit me with pepper spray and it just clears my sinuses.  Mace just makes my eyes water badly but it's not completely incapacitating.  Military grade mace is different--but you cannot but it on the street.  So I'm not sure the stuff works well enough to be relied upon.