Actually, something I've been thinking about would be to change the 'Repaint Face' ruby to act more like a paint primary and secondary face tool. Double click on the face to set the primary (perhaps giving it a color) and follow by a single click on an adjacent face (again, another color) to call it secondary. These would then orient in the shop drawing as the middle two faces - primary on top, secondary below.

I'm working with something similar as a graphic that is built into my timbers. Not quite there yet - but essentially crow's foot registration marks that point to the layout arris. makes placing that timber in the mind when looking at the drawing much easier.