From my research, not extensive, you only wax the tips and tails, not the kick zone (part with scales). I don't think there is a reason, or need to wax the kick zone. It will be hard to get the wax out. But I'm also a rookie, didn't know until this year that you waxed "waxless" skis.

For downhill skis we always put a storage wax on them, it protects the pores from drying out and in humid environments it protects the edges from rust.