I thought we want to follow the internal Airbus flow. As far as we know there is a special procedure when a frame is roll out to the flightline. So do we have any hint that this is not the case when the frame is not painted? I still ask for the idea/sense to exclude unpainted frames. Definitions are God given. You are free to do, but if you do it should make sense and free from paradox.
Actually, in A350 production, frames can be seen at different stages of completion (for instance, at station 20), before being moved to the next station.
Painting can be done at different stages, provided a paintshop is available. There is more than one sequence, all of them leading to completion, or 'roll-out'. Using the phrase 'roll-out' at any earlier stage would in my opinion be a source of confusion. We do use it differently for A380 production, only because being built in two steps in two different Airbus plants, A380s are rolled out twice.