Essential Oils

Okay, so this sharpening video took slightly longer to record than expected.  It also ended up being a much longer video than expected, it's three parts so get a cup of coffee or a snack...or both!  I like history, especially obscure history that is both hard to find and has to do with the origins of little known or forgotten objects.  The first half of this video covers a small portion of the history of oilstones, and it turns out that American oilstones have a truly interesting history.

Well, give these a watch and let me know what you think.  The Norton link I talk about in the video is here: Norton Catalog with Lots of Useful Information!

You can also check out these and several other videos on the Polthaus Youtube Chanel here:


  1. I have an old Carborundum stone my grandfather gave me. After cleaning and flattening it, how do I condition it with oil for the first time? I intend to use kerosene to clean it.

    1. I'm glad to hear you are going to give this a try! Once it is cleaned and flattened, I'd recommend soaking the stone (immersing it) in room temp to warm oil overnight. Just use whatever oil you intend to lubricate the stone with when you sharpen. Mineral oil is a good option. You can also set it in a pan and douse it with oil every few hours until it stops soaking in the oil. I'd also recommend storing the stone wrapped in a clean, lightly oiled rag. This will help keep the stone saturated and help to soak up any oil that seeps out of the stone. Let me know if you have any other questions, and good luck!