Highlighting Group of Actors

I am wondering if it is possible to group several different actors then highlight all actors in the group a certain color. I am not sure if using a post process material/volume on the camera or editing the materials in the level blueprint is best/feasible. Is it possible to create a “SetHighlightOn” function and apply it to only actors in the group? Any direction or advice is appreciated.

Found answer for grouping here: https://answers.unrealengine.com/questions/52091/how-to-add-selected-actors-to-an-array.html