Reply To: Sharpening in the cold
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While my shop is also uninsulated, about the lowest temp it will go is about 45 degrees F. And I find that uncomfortable; hardy soul to be able to work in a shop at sub-freezing temps!
The main purpose of lubricant for diamond stones is to help move the metal swarf out of the way. You can theoretically use the diamond stones dry; you just then need to wipe away the swarf with a rag of some sort much more frequently. However, it does mean you have multiple options for the lubrication medium besides water.
A light oil can work. As can alcohol. I have also used mineral spirits (freezing point is -60C), although you then probably want to wear gloves.
Another option would be to use a fine or x-fine oilstone and use it for the final honing step. I usually don’t go through all of my diamond grits when I sharpen if I don’t have to.