After sanding the sub-ribs flush to the core, work can begin on the wing skins. My method starts with taping multiple sheets together (edges trimmed straight) to form a large sheet. Make sure you try to match up the individual sheets by grain and thickness (they can vary a lot). I like to align the grain parallel to the leading edge of the wing. There are multiple methods and arguments in respect to grain direction and skinning a wing in general. I trace around the shuck leaving approx. 1/8" extra on all sides and then cut the skin perimeter.

The location for a strip of carbon fiber (0.007" ) needs to be marked. This will be glued in place on each skin for added stiffness.

With the core and shucks for one wing panel placed and ready, glue can be spread onto each skin. Once I have the polyurethane glue spread on the first skin, I add the C.F. strip and then place the skin in the bottom shuck. Align it carefully, and place the wing core on top. The same process for the top skin. The skins can be cured using weight or vacuum.