I’d clean them up first. You’d be amazed at how they may shoot. As OCD enthusiasts, we sometimes get wrapped up in things that don’t need wrapping up. I’ve had a few mil surp bolt guns and a 1903 25-20 Marlin that looked nasty. A good scrubbing and they shoot pretty good when it was all said and done. Just go easy, use the gentle stuff first (like low odor mineral spirits) and do lots of soaking. For the wood, I’d start with a gentle wash of Murphy’s Oil Soap. Then a few wipe downs with the mineral spirits. There’s a product called Howard Feed&Wax that can be used after that to help gently bring the wood back into shape. Some of the Formby stuff is good too, but have to gently experiment. Wood is unique with type and age. It all reacts differently.