latch66

You should be able to get by with one roll provided there are no mistakes either in cutting or in applying the covering.

But, I would not cover the wing in one color. Use two at the very least. Use a dark cover for one side (like a blue or black), and use a light covering for the other side (like white, or yellow). You need to be able to tell the top from the bottom very quickly on a 3D plane. Using sharp contrasting colors between the top of the wing and bottom of the wing is the easiest/best way I've found for doing this.

My wing is Yellow on top and Black on the bottom with Yellow leading edges.