Some factory lines in the 40's.
Found an article where the poster showed a progression of the wing ageing over months of use. Clean from the factory the panels are not visible nor the rivets. As the wing flexes from use you start seeing the rivets as faint dimples with angled light on the surface. The panel lines pick up stains, but are still filled but have become visible lines due to the stains.
So if you do a factory fresh the wings have no lines or rivets but, even aged the lines and rivets don't look like other wings with no puttying and filling.


