the situtation is splitting a floor face in the exiting phase to "paint" the floor tile pattern in the existing restrooms and then removing that once in the new phase and resplitting to "paint" the new pattern...
is it possible to split a floor face in existing phase, paint it, then move to new face and un-split and paint it to create a new split and new paint?
any experinece in doing this / failing at this would be appreciated
Don´t do floors with paint and split face. That is very anti-BIM. Create your finish floor as a thin floor element, on top of the structural floor, as it really is. By doing this, you can assign one finish in one face, and another finish in another face, or no finish in one phase, and finish in the next phase, etc.