French Polish Restoration: Shellac, Burnishing and Re-coating Antique Wood

Quick Answer: French polishing uses shellac dissolved in methylated spirit, applied with a cotton-wadding rubber wrapped in a linen cloth (the "rubber"). Build up 30–60 thin coats over hours or days, with light sanding between sessions, to achieve a deep mirror finish. Restoration starts with assessment of the existing finish — clean, repair, then either rub down and re-polish, or strip and start fresh. Standard professional rate £40–£75 per hour in 2026; a typical dining table top takes 8–16 hours.

Summary

French polishing is a heritage finish — a film of shellac built up by hand over many thin applications, giving wood a deep, mirror-like surface that no other finish matches for warmth and depth. It's used on antique furniture, period architectural joinery (handrails, panelled doors, banisters), and high-end restoration work. It's slow, skilled, and labour-intensive. A French polisher is rare in 2026 and command a premium hourly rate that reflects scarcity rather than complexity.

The technique itself is simple in principle: shellac flakes dissolve in methylated spirit (typically 1 part shellac to 4 parts spirit) to make polish; the polish is applied with a "rubber" — a wadded cotton ball wrapped in a linen square. Each pass deposits a microscopic layer that dries within seconds. Building 30–60 layers produces a glassy finish. Application skill — pressure, sweeping motion, when to add boiled linseed oil as a lubricant, when to "spirit off" — takes years to master.

For tradespeople adjacent to French polishing (woodworkers, decorators, antiques dealers), understanding the basics helps spot when restoration is appropriate, when modern alternatives suffice, and when to hire a French polisher.

Key Facts

Quick Reference Table — Polish Types & Applications

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Polish Colour Best for Drying Skill level
Pale shellac (button) Light gold Lighter timbers, oak Standard Standard
Orange shellac (lemon) Light amber Most antique furniture Standard Standard
Garnet shellac Deep red-brown Mahogany, dark hardwoods Standard Standard
Wax-free shellac (sealing) Variable Pre-coat for some applications Fast Standard
Premium dewaxed Variable Highest-quality restoration Standard Advanced
Bug shellac (raw) Dark amber Ageing-look restoration Standard Advanced
Spirit varnish Variable Heat-resistant top coat (uncommon now) Standard Advanced

Detailed Guidance

What is shellac?

Shellac is a natural resin secreted by the Lac beetle (Kerria lacca) in India and parts of South-East Asia. The beetle produces a hard resinous shell on tree branches; this is harvested, melted, and refined into flakes or buttons of varying colour and purity. The resin dissolves in methylated spirit and re-hardens as the spirit evaporates.

Shellac has been used as a finish in Britain since the 18th century. It's still the only finish that gives the deep, mirror-like, characteristic French polish look — modern lacquers and hard waxes try but never quite achieve it.

The rubber

The defining tool of French polishing is the "rubber" — a wadded ball of cotton wool wrapped in a square of linen or fine-weave cotton, twisted at the back to form a handle. The rubber absorbs polish from a small dish, releases it through the linen onto the wood, and acts as the application surface that lays out an even, very thin film.

Construction:

The rubber is "charged" with polish by dipping the wad in a small dish, twisting back to evacuate the linen, then spirit-wiped off the linen surface. Application is by a sweeping motion in straight lines, then circles, then long parallel finishing passes — this layered approach builds up a film without leaving brush or wipe marks.

The build sequence

A typical French polish from bare wood:

  1. Filling — fill grain pores with rubbing pumice mixed with shellac (called "fillering"). Provides a smoother base.
  2. Bodying-up — first 10–20 thin coats. Each coat applied with the rubber, allowed to dry briefly, then over-coated.
  3. Body — main film build. 20–40 coats. Boiled linseed oil added periodically as a lubricant.
  4. Spiriting off — final passes with a near-empty rubber to remove oil and even the surface.
  5. Burnishing (optional) — light buffing with rotten stone or pumice for the deepest mirror finish.

A typical small table top (1m × 1m) takes 8–16 hours of skilled work over 2–3 sessions. A large dining table or piano case takes 30–80 hours.

Restoration vs full re-polish

For most antique furniture, full strip-and-re-polish is rarely the right answer. The original finish has a patina that is part of the value of the piece. Restoration is preferred:

  1. Clean — denatured alcohol or specialist cleaner to remove dust, grease, and old wax
  2. Assess — note where finish is intact, where it's worn through, where there's damage
  3. Spot repair — fill gouges with shellac stick (heated and dripped), level with razor blade, polish flat
  4. Refresh — light passes with a sparingly-charged rubber to revive the existing surface
  5. Re-coat selectively — build up worn areas to match adjacent intact polish

Full strip-and-re-polish is reserved for cases where the original finish is too damaged to restore — water damage, fire damage, paint over the original. Always discuss with the customer; many believe their piece needs strip-and-re-polish when restoration is the right answer.

Damage and repair

Common damage modes:

Frequently Asked Questions

What's the cost of restoring a French-polished antique table (homeowner-friendly)?

For a typical Victorian antique dining table (1.6m × 0.9m) with normal wear, professional French polish restoration costs £450–£850 in 2026 — typically 8–12 hours of work at £50–£70/hour. Full strip-and-re-polish runs £900–£1,800 for the same table. A polish refresh (cleaning and light re-coating, no spot repair) is £180–£350. Pricing varies widely by region — London and South East rates 25–40% higher than the rest of the UK.

Can I just use modern lacquer on an antique?

You can but it's a one-way decision. Once a lacquer film is applied over original shellac, the only way back is full strip-and-re-polish. Modern lacquer protects better against alcohol and heat, but loses the depth, warmth and authenticity of shellac. Most antique restorers refuse to apply lacquer over period furniture for this reason.

Can I learn French polishing as an amateur?

Yes — basic French polishing is teachable in 2–3 days for someone with woodworking aptitude. Reaching professional level (consistent flawless finish on premium pieces) takes 3–5 years of regular practice. Many woodwork colleges offer evening courses; the British Antique Furniture Restorers' Association (BAFRA) maintains a list of qualified polishers and teachers.

What about heat-resistance for a kitchen table?

French polish is moderately heat-resistant but susceptible to alcohol, hot drinks, and high temperatures. For a kitchen table that will see hot dishes and red wine spills, French polish is the wrong finish. Recommend pre-catalysed lacquer or hard wax oil — neither has the same look but both are far more durable. French polish is for furniture used in formal contexts where damage is unlikely.

Should I hire a French polisher or DIY?

DIY for: small projects, refreshing existing polish, learning the technique on a low-value piece. Hire a professional for: high-value antiques (anything over £500 in resale value), complex shapes (turned legs, carved details), full strip-and-re-polish, anything where damage to the piece is irreversible. Most antique restorers in the UK are specialists with 10–30 years of experience.

Regulations & Standards