Sharpening a knife with a sharpening stone is a relatively straightforward process, but it does require some care and attention. Here's a step-by-step guide on how to sharpen a knife with a stone:
Start by selecting the appropriate grit of stone for your knife. If your knife is dull, you'll want to start with a coarse grit stone, around 200-300 grit, to remove any nicks and chips in the blade. If your knife is only slightly dull, you can start with a finer grit stone, around 600-800 grit, to hone the edge.
Secure the stone in a vise or clamp to hold it steady while you sharpen. You can also place the stone on a damp towel to keep it from slipping.
Hold the knife at a 20-degree angle to the stone, making sure that the angle is consistent as you sharpen. Hold the handle of the knife with your dominant hand and place the fingers of your other hand on the back of the blade, near the edge, to guide it as you sharpen.
Starting with the heel of the blade, push the knife across the stone while simultaneously moving it down and away from the edge. Use moderate pressure and make sure that the entire length of the blade makes contact with the stone. Repeat this process on the other side of the blade.
Repeat this process several times, until the blade is sharpened to your desired level. After a few passes on the coarse grit stone, you can move to a finer grit stone to finish honing the edge.
Once you are done sharpening, you can use honing steel to realign the edge of the knife, after that clean the knife and the stone with a damp cloth.
Now for the oil on the sharpening stone, usually honing oil or mineral oil is recommended, you can use it to lubricate the stone and prevent it from clogging with metal filings, keeping the stone in good condition and making it last longer.
The best way to sharpen a knife is to use a combination of coarser and finer grit stones, starting with the coarse stone to remove nicks and chips, then progressing to a finer stone to hone the edge. Make sure to keep the angle consistent, and use moderate pressure to avoid damaging the blade.
It does not matter which side of the stone to go first, as long as you maintain a consistent angle, and switching sides frequently to ensure an even edge.
When holding a sharpening stone, grip it firmly with one hand while holding the knife with the other, while maintaining the appropriate angle.