I would like to be able to add a paint layer to system families like walls without it impacting the actually thickness or creating extra objects when exploding to parts.
This way something like an exterior tilt concrete wall can have a paint automatically assigned to it and changed on the fly. It also helps differentiate concrete material vs paint material.
This would support this post: https://forums.autodesk.com/t5/revit-ideas/materials-and-finishes-are-not-the-same/idi-p/6489981