Each wing half can be seperate pieces, so no problem cutting one of your sheets in half and using the pieces to build a chordwise fluted wing. When the wing is done, put a center wrap around the middle and go flying!!!
HOW WILL IT EFFECT THE FLYING AND STRENGHT OF THE PLANE OVERALL.
Not at all! In fact if you look at the construction of the Debonair, which is a 60" wing span trainer, the wing is built in two halves!