For my Boston Typhoon I too used a 1/64 ply base for the planked deck, and it certainly makes life so much easier, as already mentioned . My planks were 1/32 ply glued with Evostick wood glue onto the base, which I then fixed to the deck with epoxy resin. I chose a good straight and fine grained ply sheet for the planks, very lightly stained it to my preferred tone and then varnished with Ronseal Matt (polyurethane, not the quick drying stuff which I think is far inferior). Then I cut the ply into strips, sanded them to uniform width and applied black felt tip pen to the edges to represent the caulking (the initial varnish prevents felt tip ink seeping onto the plank surface). I cut my planks to 20 foot scale lengths (about 190mm at 1:32 scale) and staggered them to give a 5 plank joint seperation.
I fashioned a margin strip around the perimeter of the planking. This allowed the plank joggling referred to in the earlier post. It is a real pain to get right, but looks so good and the end result is really satisfying. Golden rule is that the planks never taper to a sharp point (eg. at the curve of the bows), but that the plank ends are cut to 1/3 width at the joggling. I painted the edges of the deck composite to hide the various ply laminations.
By using ply planks, the cost is kept low and the result is very impressive. I have used lime (lovely wood to work with) planking on other models but don't think there is any significant improvement in end result that justifies the additional cost. Regarding the potential problem of fixing the composite planked structure to the camber of the deck, the forecastle section is not a compound curve, so no problem. The well deck and aft deck have both camber and shear, but there are large apertures in these planked areas, so should not present difficulties fitting to the compound deck shape - it was no prob on my BT. A possible limitation with the planking method described is that you will not be able to sand out any irregularities in the surface, without affecting any previous staining or possibly exposing ply laminates. So care must be made to set the planking to a fairly even level.
Jim