The finish is the last thing applied to a piece of furniture, but it might be the most important decision you make. It protects the wood from moisture, abrasion, and UV light while defining how the piece looks. A beautiful piece of walnut can be ruined by a thick, plastic-looking polyurethane coat just as easily as a mediocre piece of pine can be elevated by a well-executed Danish oil finish.
This guide covers every major finish type available to woodworkers — oil, wax, shellac, varnish, lacquer, water-based, and conversion finishes — with honest advice on when to use each, how to apply them, and what results to expect.
The Two Categories of Wood Finish
Before diving into specific products, understand that all wood finishes fall into one of two fundamental categories:
Penetrating Finishes
These soak into the wood fibres rather than building a film on the surface. They enhance the wood’s natural colour and texture while leaving a low-profile, natural feel. Examples: Danish oil, linseed oil, tung oil, and penetrating waxes. Easy to apply and repair, lower durability.
Film-Building Finishes
These cure into a hard, protective film on the wood’s surface. They provide more significant protection against moisture and abrasion. Examples: polyurethane, lacquer, shellac, varnish, and water-based finishes. More durable, harder to repair, and can look plastic if applied too thickly.
Penetrating Oil Finishes
Danish Oil
The best beginner finish. Danish oil (actually a blend of oil, varnish, and solvent) wipes on easily, dries in 24–48 hours, and produces a beautiful, natural-looking satin finish. It offers moderate protection and is very easy to recoat and repair.
Best for: Cutting boards (use food-safe version), small decorative items, turned bowls, indoor furniture where aesthetics matter more than maximum durability.
Application: Wipe on liberally with a lint-free cloth, allow to penetrate 15–30 minutes, then wipe off all excess. Allow to dry fully before recoating (24 hours minimum).
Amazon pick: Watco Danish Oil Natural — the most widely available and reliable Danish oil product.
Linseed Oil
One of the oldest wood finishes. Raw linseed oil dries very slowly (weeks). Boiled linseed oil (BLO) contains metallic driers and dries in 24–48 hours — but it yellows significantly over time and offers minimal protection by itself. Traditionally used as a sealer coat under varnish or wax.
Caution: Linseed oil-soaked rags spontaneously combust. Lay them flat outdoors to dry before disposal — never bundle them up wet.
Tung Oil
Pure tung oil (not “tung oil finish” which is a marketing term for Danish oil) is a premium penetrating finish that provides slightly better water resistance than linseed oil and doesn’t yellow as aggressively. It requires many coats (4–7) and slow drying between each, but produces a beautiful, durable penetrating finish.
Wax
Wax is a traditional finish and an excellent topcoat over other finishes. It provides a pleasing soft sheen, repels water droplets, and is trivial to renew. However, it offers very limited protection alone and should not be the sole finish on working surfaces.
Best for: Topcoat over shellac or oil, antique furniture restoration, tool handles, and decorative pieces that won’t see heavy use.
Application: Apply a thin coat with fine steel wool (0000 grade) or a lint-free cloth, allow to haze (5–10 minutes), then buff to sheen with a clean cloth.
Amazon pick: Briwax Original Clear — the classic English paste wax, excellent quality.
Shellac
Shellac is one of the most underrated and versatile finishes in woodworking. It’s made from the secretions of the lac bug dissolved in alcohol. It dries incredibly fast (15–30 minutes), adheres to virtually any surface, and produces a warm amber glow that makes wood look alive.
Best for: Universal sealer coat under any other finish, antique restoration, interior decorative furniture, period-style pieces. Not food-safe in its raw form; avoid on cutting boards.
Application: Apply with a high-quality brush or pad (French polishing). Multiple thin coats, lightly sanded between with 320–400 grit, build a beautiful finish quickly.
Shelf life warning: Pre-mixed shellac (Zinsser SealCoat) has a 3-year shelf life from manufacture; flake shellac mixed fresh in denatured alcohol has a 6-month shelf life.
Amazon pick: Zinsser SealCoat Shellac — pre-mixed, dewaxed, food-safe when cured, and an excellent universal sealer.
Oil-Based Polyurethane
The most durable and widely used finish for floors and working furniture. Oil-based poly cures hard, resists water, alcohol, and abrasion, and builds quickly (3–4 coats). The trade-off: significant yellowing over time (beautiful on dark woods like walnut; problematic on maple and painted surfaces), strong solvent fumes requiring good ventilation, and long dry times (4–8 hours between coats).
Best for: Tabletops, floors, kitchen cabinets, and any surface that sees daily use and abuse.
Application: Sand to 180 grit, apply with a quality bristle brush using long, even strokes, sand between coats with 220–320 grit, final coat at 400 grit for a satin sheen, or buff with steel wool for a satin/matte look.
Amazon pick: Minwax Fast-Drying Polyurethane — reliable, widely available, good gloss and satin options.
Water-Based Polyurethane
Low odour, fast drying (2-hour recoat), non-yellowing (ideal for light woods and white-painted surfaces), and easy water cleanup. The trade-off: lower durability than oil-based, slight grain raising on first coat, and a bluish tint in the can (though it dries clear).
Best for: Maple, birch, and pale hardwoods; pieces where natural colour preservation matters; indoor environments where fumes are a concern.
Application: Apply with a good synthetic brush or foam applicator. Raise the grain with a damp sponge before final sanding to avoid grain raising after the first coat.
Amazon pick: General Finishes High Performance Water Based Topcoat — the best water-based finish for furniture, noticeably more durable than Minwax water-based.
Lacquer
Professional cabinet shops spray lacquer because it dries in minutes, builds quickly, and produces a flawless, film-build finish. Brushing lacquers are available for hand application. Lacquer is not as durable as polyurethane and can be damaged by water and heat, but it’s easily repaired — fresh lacquer dissolves the previous coat, creating a chemical bond.
Best for: Production furniture, cabinets, musical instruments, and projects where a fast turnaround matters.
Finish Selection at a Glance
| Finish | Durability | Ease of Use | Appearance | Best For |
|---|---|---|---|---|
| Danish Oil | Low-Medium | Very Easy | Natural, Matte | Interior decorative pieces |
| Wax | Low | Easy | Soft Sheen | Topcoat, antiques |
| Shellac | Medium | Medium | Warm Amber | Sealer, antique restoration |
| Oil-Based Poly | Very High | Medium | Gloss/Satin | Tables, floors, cabinets |
| Water-Based Poly | High | Medium | Clear | Light woods, low-odour needs |
| Lacquer | Medium | Hard (spray) | Gloss/Satin | Cabinets, production pieces |
The Finishing Process: Step by Step
- Sand progressively — 80 → 120 → 150 → 180 → 220 (for most finishes). Never skip a grit.
- Raise the grain — Wipe with a damp cloth, allow to dry, then sand lightly with 220. This prevents grain raising under water-based finish.
- Remove all dust — Vacuum, then wipe with a tack cloth or compressed air.
- Apply sealer coat — A thinned first coat (10–15% thinner) penetrates better and seals the surface for subsequent coats.
- Sand between coats — 320–400 grit lightly. You’re levelling, not removing the finish.
- Apply final coats — Two or three medium coats with proper flash time between each.
- Final rubbing out — For a professional result, rub the cured final coat with 0000 steel wool or 600-grit wet/dry paper lubricated with mineral oil, then apply paste wax for the final sheen level.
Conclusion
The right finish for your project depends on the wood species, the piece’s intended use, your working environment, and the look you want. There’s no single best finish — but there’s definitely a best finish for each project.
Start with Danish oil or shellac to build confidence. Move to water-based poly once you’re comfortable with the application process. And when you’re ready to get serious about durable, professional results, oil-based polyurethane applied correctly is hard to beat.
