After stripping the wing back to bare plastic I resprayed it with a white gloss from a Tamiya rattle can and left it to cure for a couple of days before spraying the other side, again leaving it to set completely.
As the particular aircraft I want to model had a white strip around the wing edges top and bottom I masked off the wing using Tamiya tape cut to 1mm width;
The decals are VERY thin and extreme care is needed during application as they are very easy to rip, something I did in a couple of areas as you can see in the picture above and the reason I had kitchen towel underneath.
For painting I decided to use Winsor and Newton acrylic paint rather than oils with Vallejo acrylic retardent to slow down the drying time;
The underside colours were painted first, keeping the paint fairly thin to achieve the streaking effect that was a characteristic of this particular aircraft;
Due to the quick drying time I was able to paint the top surface then remove the tape, taking a LOT of care not to rip the woodgrain decal;
I still would have preferred the wing in an overall green finish though....