Just wondering for later (structuring model), could an extension be written to reverse faces on a specific layer within a DC, then paint the model a material selected by a drop down?
I think this quite simple if you use Selection Toys from @thomthom
You can first select any object assigned the layer you want to deal with, then right click, choose the command Select > Select All Same Layer to select all entities have the same layer with selected object.
Next, you need to filter faces from current selection by choose Select Only > Faces.
Once you get the faces, you can apply the material for them
SuperStar again mate! I’ll check that out! 