Rolling an 8 cm curve across a whetstone
A full-size serpette knife has a longer, gentler curve than the compact models, so it can be sharpened on the corner of an ordinary bench stone if you roll the blade as you go.
- Wet a combination whetstone: around 400 grit to reset a worn edge, 1000 for regular upkeep.
- Hold the blade at about 20 to 25 degrees with the edge meeting the long corner of the stone, so only that corner touches the curve.
- Sweep from the brass bolster to the point while lifting the handle slightly, so every part of the curve meets the stone in turn.
- Match the strokes on the other side, feel for an even burr along the full 8 cm, then remove it with a few light alternating strokes.
