Plastic strip was used as a structural filler for the large gaps between the upper surface of the inner and outer wing panels.
When the cement had dried, the excess white plastic was shaved off with a new hobby blade.
The lower surface fit was much better - only a few minor gaps.
Milliput two-part epoxy putty was used to smooth the gap. Some serious sanding and polishing followed thus step, eliminating all panel detail.
Raised non-skid walkways were restored using self-adhesive foil cut to shape after panel lines had been rescribed.