There are simulated stitches done with a T pin and white glue. If you click on the photo and zoom in you can just see the stitches. That wing was painted however it fish eyed. I removed the covering and reinstalled, the wings are sprayed with Poly Spray silver now. I didn't want to put the top coat on until I modified my air system. That happened about 3 years ago and I never got back on the Super Cub. I was actually building it for a dear friend and he has left us, he lost interest in scale and war birds and began flying ARF from Aeroworks, of course I assembled all those for him, he did keep me busy! The photo is from 2004 and it is still not painted! When I paint the Champ fuselage I hope the paint those wings when the spray booth is set up. Next winter I hope to recover the fuselage and tail, then install the Roto 85 FS from the Cherokee. When I built the the plane he bought a 3W 55 CS which was installed and never ran, it sits on my shelf.