Paste wax Carnuba

My beaters get 30 weight liberally applied. The purdy stuff gets Rem oil or similar. I don't store the blades in sheaths.

... or long period storage i sweep the knife clean with a special microfiber cloth for taking moisture away and i apply a decent film of gun maintaining oil ( the one we use in periodic weapon maintenance ) and then wrap the blade with waxpaper , seal it with a tape and put in the box separated from the sheath, no matter what material the sheath is  made of ...

... for the sheaths now , clean them well with a clean wet cloth, let them dry naturally and then ...

... for leather : wax the out side and put some babypowder or footpowder inside , wrap it up in a clean cotton cloth and store it in dry environment together  with the knife in a dark place ...

... for synthetic : if the sheath has soft elastic and/or soft plastic components, just put some babypowder or footpowder on, wrap these components with soft packaging paper and tape them ( to prevent osmosis of the material due to moisture )  and  put it away from the sun .

... if you plan storing the knife for very long period , simply repeat the above procedure every 6 months , if you can't do so then instead of gun-oil put a film of petroilbased-grease on the blade , wrap  it up with waxpaper ( blade alone, handle alone and then all the knife together ) and let it rest  ...
 
... of course depending to the handle's material, for long term storage, you have to act accordingly ...

... that's all ... other opinions are wellcome

... a small plastic bottle with gunoil and a piece of cotton cloth ... that's what you need for general "care" of your knife everywhere , ... you finish your job, you thoroughly clean your knife, you give it its sharp edge back and then, you sweep it clean and if it isn't ment do be used soon enough, you rub a thin film of gunoil with some clean cotton cloth on the blade ... knife is ready for the next task