With the usual treatment the wing, ailerons and flaps are covered with 1oz fiberglass cloth sealed with West System epoxy. A coat of filler primer was applied before touching spots with red finishing ( glazing) putty, after sanding most the primer with 120 grid I reapplied a second coat of primer, filled few more spots then sanded most the primer again. At this stage the wing look nice with minimal work on few spots. One more coat of primer then fit the wing on the fuselage. Once the wing fitted the fuselage will receive the same treatment then the last three primer coats will be sprayed on the whole airplane so the sanding gives a nice transition from the wing to fuselage.