As a professional restorer/conservator I concur with S7horton's comments on this matter. Moisture has no place in solid or wood veneer. In fact, one reason that clear coat finishes are applied in the first place is to keep moisture out. Clear coat finishes do not soak in oils or waxes either, all of that stuff stays on top of the finish. The best thing one can do to keep your wood items looking new is to keep them away from sunlight and heat. Dusting with a clean, soft slightly damp cloth as all that is needed.
As for lemon oil products, they are an oily petroleum distillate with a lemon scent added. They will add a temporary shine, but that's it.
As for lemon oil products, they are an oily petroleum distillate with a lemon scent added. They will add a temporary shine, but that's it.