I would like to refinish one of my rifle's stocks with an oil finish as an old leather cheekpad discolored the wood beneath it. Is it necessary/desirable to remove the sling swivel mounts to do so? I think they just screw in and I feel like the more you take screws in and out if wood, the more it wears out the hole. What about the buttpad? It is a factory Pachmayr pad. I can find the tiny holes where the screws went in and can feel them probing with an allen wrench but I cannot see them to determine their size or the screw head type? Any suggestion on how to proceed?