French Polishing: The Hand-Rubbed Shellac Finish With Unmatched Depth

French polish is the finish of grand pianos, violins and Georgian furniture. Its depth seems to sit inside the wood, as if you’re looking into still water. It’s created not by a single thick coat, but by hundreds of passes with a cloth pad, each leaving a layer of shellac thinner than tissue paper.

It’s a slow craft, like building a sandcastle one grain at a time — and the patience is the point.

Why shellac?

Shellac is a natural resin dissolved in alcohol. Each new layer partly dissolves the one below, fusing into a single, clear film. That’s what allows French polish to build without visible layers.

Step 1: Preparation

1. Sand the wood to 320 grit or finer, or finish with a card scraper for crispness.
2. Remove every trace of dust.
3. Work in a warm, dry, dust-free room. Humidity causes cloudiness (blushing).

Step 2: Make the rubber

Form a ball of cotton wadding about the size of an egg and wrap it in a square of lint-free linen. Twist the cloth tight at the back to make a smooth, flat face — the sole of your tool.

Step 3: Fill the grain

For open-pored woods like mahogany or walnut, sprinkle a little fine pumice on the surface. Charge the rubber lightly with alcohol and rub in small circles. The pumice and wood dust form a paste that fills the pores. Wipe off excess and let it dry.

Step 4: Bodying up

1. Charge the rubber by opening it and adding a little shellac to the wadding. Re-wrap.
2. Press the face onto your palm to spread the shellac and check it’s not too wet.
3. Glide onto the surface already moving, in small circles and figure-eights, covering the whole area.
4. Add a tiny drop of oil to the face if the pad starts to drag.
5. Glide off the surface while still moving.
6. Work for 20–30 minutes, then let the shellac harden overnight.

Think “land like a plane, take off like a plane”. Never stop the rubber on the surface — it will stick and leave a mark that needs sanding out.

Step 5: Build in sessions

Repeat bodying sessions over several days. Between sessions, lightly level any nibs with very fine abrasive. You’ll see depth slowly appear, like the wood is being lowered into glass.

Step 6: Spiriting off

When the body is thick enough, use a fresh rubber barely dampened with alcohol and almost no shellac. Work in straight strokes along the grain with light pressure. This removes the oil smears and burnishes the surface to a brilliant gloss.

Troubleshooting

Colour and French polish

Garnet and amber shellacs add warmth; blonde shellac keeps light woods pale. You can also dye the wood first — see our wood dyeing guide.

Durability and care

French polish doesn’t like heat, water or alcohol. Use it on decorative furniture, boxes, picture frames and instruments rather than kitchen tables. For a durable wipe-on alternative with a similar look, consider an oil-varnish blend.

Compare finishes in our finishes guide and our HVLP spraying guide.

Beginner, intermediate, pro

Beginner: try a “padding” shellac finish on a small box — a few sessions, no grain filling.

Intermediate: full French polish on a closed-grain wood like cherry or maple.

Pro note: repairing and revitalising antique French polish. Often you don’t need to strip — clean it, then “revive” with a pad charged with thin shellac and alcohol. See our antique restoration guide.