This takes three days
OK, now it is time to laminate the center joint. First, sand the center joint smooth. The finger should not know when it crosses the center joint. Also, fine sand with 400 the center portion of the wing at least 12cm from both sides of center. We will lay three laminates per side, each impregnated with 24 hour epoxy, however, we can do two laminates per day because each will be dry enough to feather the LE edge to receive the overlap. The laminates will be 17 cm wide, then 20 cm wide, and finally 23 cm wide. Each layer receives just enough epoxy to bond it to the surface. We use a 2" wide brush and pat the epoxy into the cloth. We measure the center often during the process to ensure that it stays perfectly centered on the wing. Once the entire laminate is bonded, we lay paper towling over it and absorb any excess epoxy. Each layer is 49 gram per square meter cloth. Between laminates, there is plenty of drying time to start on the fuselage.
Here are photos of the laminating.