If an object doesn't have any real reason why it has to be non-recolorable, is there a switch somewhere that enables it to be recolorable? (I did do due diligence and spend some hours trying to research this topic)

At the moment I'm looking at a fence that has two channels, neither of which is recolorable, but I can't see in S3Pe, TSRW, or Texture Tweaker, where the object is made non-recolorable in game., so I don't know where to change it.