Strop often, stone rarely, and know which one you need

Quick answer: Strop when the edge has gone from "great" to "a little tired." Go to the stone when stropping stops bringing it back in a dozen strokes, or when there's a nick, a flat spot, or a bevel that's wandered. The strop maintains. The stone repairs.

The Tuesday night problem

You're paring a tenon cheek. The first three cuts are clean. On the fourth, the chisel drags a little and leaves a fuzzy line instead of a shiny one.

Most people do one of two things. They push through, because getting the stones out feels like a ten-minute detour. Or they pull out the stones, regrind the whole bevel, and lose twenty minutes and a few thousandths of steel to fix a problem that needed fifteen seconds.

Both are mistakes. The edge isn't broken. It's slightly rounded at the very tip, and a strop fixes that.

What each one actually does

A stone removes metal. Even a fine one does. Every pass on a stone takes a little steel off the bevel, which is the point, and also the cost. Do it too often and you'll shorten a good chisel and, worse, slowly change its angle without noticing.

A strop barely removes anything. Loaded with a fine compound, it polishes the very tip and knocks off the thin wire of steel that folds over after a few minutes of work. That wire is what feels dull. Take it off and you've got the edge back.

That's the whole idea. Honing resets the geometry. Stropping refreshes the last few thousandths of an inch.

If you haven't yet learned to raise and remove a burr on a stone, start with raising a burr. Stropping only works well on top of a clean edge to begin with. It's a finishing move, not a substitute for the real thing.

Build a strop that doesn't make things worse

The most common strop is a bad one. Leather glued to nothing, or a soft hanging strap, flexes under the blade and rounds the edge over. Every pass makes the tip a little blunter while it feels like you're sharpening.

Build it flat instead:

• Take a piece of hardwood or MDF, roughly 2 inches wide and a foot long.
• Glue a strip of leather to it, rough side up, with contact cement or wood glue. Clamp it flat and let it dry.
• Rub on a bar of compound. Green chromium oxide is the standard and it's cheap. Diamond paste works too. Use a little. A thin, even smear beats a thick one.
• Keep a second face on the other side of the board, bare leather or plain card, for a final polish.

Total cost is whatever scrap and a bar of compound run you. Total time is about the length of a coffee break.

How to use it

Lay the bevel flat on the leather. Feel it sit. Lift the back edge a hair until it's just touching and no more. Then pull the tool backward, edge trailing, the way you'd drag a cart behind you.

Never push edge-first. The edge will bite the leather and slice it, and you'll see the first scar on your strop within a week.

Light pressure. This isn't a grinder. Five to ten strokes on the bevel, then lay the chisel flat on its back and give it three or four more to take off the wire. For a plane iron, do the same. For a knife, work each side evenly.

Then test it on end grain. If it slices cleanly, you're done.

When the strop has done all it can

Here are the signs you need a stone, not more leather:

1. You've stropped twenty strokes and it still drags.
2. You can see a nick when you tilt the edge toward a light.
3. A dull edge throws back a thin bright line of light where a sharp one shows nothing. Look at the very tip. If you can see it, it's rounded, and the strop can't cut back far enough to fix it.
4. The bevel looks lumpy, or the angle has crept higher than you started with.

Check with your thumbnail, not your skin. Rest the edge on the nail and tilt it gently. A sharp one bites and holds. A dull one skates. Never drag the edge along your fingertip.

When you hit one of those, go to the stone, restore the bevel, take the burr off, and then strop. That sequence is the whole system. It's also the reason learning to sharpen pays off across every tool you own.

The case for skipping the strop

Plenty of good woodworkers don't strop at all. They keep a fine stone, something in the 4000 to 8000 grit range if it's a waterstone, right on the bench and take a few light strokes whenever the edge fades. That's honing, and it works.

It has one real advantage. A fine stone corrects a slightly drifting angle as it goes, where a strop leaves it alone. If you've got the stone out and it's flat and wet, use it.

The strop wins on speed. Ten seconds. No water, no flattening, no mess. If it's on the wall and the stone's in a drawer, the strop will get used and the stone won't. A sharpening setup you actually reach for beats a better one you don't. If you're building out a bench that works on an ordinary weeknight, read how to build a garage workshop you'll use on a Tuesday night and put the strop where your hand lands.

A simple schedule

Strop every time the edge feels a little off, or at the start of any session where you care about the cut. Use the stone about once for every ten or twenty strop sessions, or any time you chip or nick the edge.

Keep it boring. That's the point. A sharp edge you touch up a little often stays sharp for years. One you let go until it's miserable costs you an hour on the stone each time.

And if you borrow someone's chisel, strop it before it goes back. A tool returned sharper than it came is the cheapest way to be the guy people lend to twice.