3-piece wing conversion:
outer wing:
TE of wing as well as LE of aileron sheeted.
Some tape put on the surface of the wing to protect it while sanding the TE.
TE of aileron sanded to a point down to the 1/64" thick ply.
Tops of flaps sheeted.
Center wing:
Heavy duty auto FG cloth put onto the top sheeting around the wheel wells and finishing resin added.
That should just about 99 44/100's guarantee no retracts will be popping through the top sheeting!
Some neo coat (for scuba divers) put onto damaged wheels from pins sticking out on the P-61.