Exoskeleton is the outer protective coat for some animals and  mammals. Advantages of exoskeleton include the safety to animal,  and ability to live on a variety of surfaces â¦ .The disadvantage  includes the restriction of growth and size.xoskeleton is the outer protective coat for some animals and  mammals. Advantages of exoskeleton include the safety to animal,  and ability to live on a variety of surfaces â¦ .
1 Volatile oils that dry out are generally more harmful to your health. 2  Mineral oil does not give off harmful vapour. 3  Water is used as a cutting fluid in some stones, but it dries even over short sessions, does not seem to lift filings as well as mineral oil, and remains on the tool after honing.
Many thanks, gentlemen. Yes, I have 2 stones that I've always oiled...never watered. I've run out of honing oil, and I won't be getting a re-supply for a month, so I'll have to use a substitute until then. I tried thanking you by clicking the Thanks button, but it didn't work. Paul. If you come up to it, and you just can't do it, then that's jolly well where you are..