Keith,
The plastic winged A6 had access panels but no panel lines. The removable fuselage panels of all A6 were caulked similar to bath tub silicone caulking beneath perimeter of each removable panel in an attempt to seal out corrosive sea spray. 'tween missions an intensive maintenance cycle re-caulked every 6 within the 90~120 day onboard duty cycle. Below is a view of a typical fuselage surface.
Note the more granulated surface of the all grey scheme tends to appear dirtier and splotchy. Contributing to this splochy look was when a panel was opened it was caulked then painted over with inconsistant pigment rattle can or touch-up guns of questionable maintenance.
. Note there are no ailerons on an A6. There are wing top spoilerons for axis control. Movie models did not have flaps, they were painted on.
All movie six models had "0" panels other than the painted on residual corrosion. White over grey were gloss which tends to sprite the surface difusing details...though it was the same panel maintenance.
Below is an example of how the A6 permanent adhesive panels are CNC cut for placement on the fuselage and wing. Each is a replica of a
predominant panel on the wing, weapons, and fuselage. On a model of this size a little goes a long way as shown below. These panels are on an A4 Skyhawk..