Waxes are not as much in favor as they once were. Try cleaning instead first with a very soft cloth dampened with warm water with a little bit of Murphy's Oil Soap in it. A detergent may be too harsh. Wipe gently, working in to remove soil with fresh soap and water, and go back several times. Never really "wet" the the wood! Rinse at least twice with plain warm water on a soft cloth. Wipe with a dry cloth, and allow to fully air dry.
(Be sure to wipe the metal down with a very simple gun oil -nothing fancy (no solvents, CLPs, etc.) Use Outer's or the most simple Hoppe's oil.)
Once the wood is dry, try applying a lemon furniture oil on a small spot. Just use a little, again on a soft cloth. Buff lightly. If you like how it looks, do the entire wood with it. Repeat again in several days.
The mineral oil, unlike a wax, can be easily removed if you don't like the look. Just use the soap and warm water.