My 2 cents worth on WD 40. One thing NOT to use it on. Gun actions. The outside of a gun is fine, but not on the inside. I have had a couple of guns that I put up for extended periods after soaking them down with WD 40 inside and out, lock up. The action was frozen by the dried WD 40. The trigger wouldn't even move. I had to tear the action and bolt completely down and soak them with solvent to get the varnish loose.
Another trick with the wax. When nailing thin wood or close to the edge, stick your nail into the wax before you use it. It will help keep the wood from splitting. An old carpenter I worked around had a hole drilled in his wooden handled hammer. He melted wax into it. He would stick his finish nail into it before nailing a trim piece.