Sharpening and Maintaining Edge Tools

A cheap knife that's razor-sharp will outperform an expensive knife that isn't. Sharpness affects almost everything downstream in a leather project: a dull edge tears fibers instead of slicing them, drags through skiving instead of shaving cleanly, and forces you to press harder, which is exactly when cuts go crooked or slip.

Stropping vs. sharpening

These are two different jobs. Sharpening removes metal to create or restore an edge, usually with a stone or sandpaper progression. Stropping doesn't remove metal — it polishes and realigns the edge you already have, and it's the maintenance step that keeps a sharp tool sharp for longer. A quick strop before or during a project takes seconds and makes a noticeable difference.

To strop correctly, draw the blade away from the edge, trailing it across the leather rather than digging into it — pushing into the strop the way you would sharpen on a stone will cut into the leather and round over the edge instead of polishing it. A plain strip of vegetable-tanned leather loaded with polishing compound on the flesh side works fine; you don't need a specialty product to get started.

Awls

Diamond-point awls have multiple facets, and each one needs attention — twist the awl slightly as you pull it across the strop so every facet gets polished evenly, rather than favoring one side. An awl that's merely "pointy" isn't necessarily sharp; it should pierce leather with very little resistance, not punch or tear a hole.

Skiving knives

Skiving knives are typically held at a shallow, consistent angle (a common reference point is around 15-20 degrees) and sharpened with a stone or fine sandpaper progression before finishing on a strop. The angle matters more than the exact grit you use — changing angle mid-stroke is what ruins an edge, so smooth, consistent passes matter more than pressure.

Build a maintenance rhythm

You don't need to fully resharpen every tool constantly. A reasonable rhythm is: strop before you start working, strop again if you notice drag partway through, and reach for a stone or sandpaper only when stropping alone stops restoring the edge.