Finishing protects wood and brings out its beauty. Choosing a finish can be confusing because there are many types, each with different appearance, durability and application methods. The right choice depends on how the piece will be used and the look you want.
This guide compares common finishes in general terms. Always follow the product label for application, drying times and safety.
What Finishes Do
Finishes:
- Protect against moisture, stains and wear
- Enhance or change appearance
- Make surfaces easier to clean
Finishes fall into two broad groups: penetrating finishes that soak into wood and film finishes that build a protective layer on the surface.
Penetrating Oils
Linseed Oil and Tung Oil
These oils soak into wood and cure, enhancing grain with a natural look. They offer limited protection against water and wear compared with film finishes. Pure oils can take a long time to cure.
Oil Blends
Many “Danish oil” or “finishing oil” products blend oil with varnish and solvent. They are easy to wipe on and offer a bit more protection than pure oil.
Best for: Decorative pieces, items where a natural feel matters.
Safety Note
Rags soaked with oil-based finishes can spontaneously combust. Follow label instructions for disposal, such as laying rags flat to dry outdoors or storing them in water in a sealed metal container.
Wiping Varnish
Wiping varnish is varnish thinned for easy application with a cloth. It builds thin coats with fewer brush marks.
Polyurethane
Polyurethane is a durable varnish available in oil-based and water-based versions.
Oil-Based Polyurethane
Pros: Durable, warm amber tone, widely available.
Cons: Strong odor, longer drying times, yellows over time.
Water-Based Polyurethane
Pros: Low odor, fast drying, clear appearance, easy cleanup.
Cons: May raise grain; can look less warm on some woods.
See how to apply polyurethane.
Shellac
Shellac is a natural finish dissolved in alcohol. It dries quickly and works well as a sealer under other finishes.
Pros: Fast drying, easy repair, good sealer.
Cons: Less resistant to heat, water and alcohol.
Lacquer
Lacquer dries very quickly and is often sprayed. It creates a smooth finish and is common in professional shops.
Pros: Fast drying, smooth finish.
Cons: Usually requires spray equipment and ventilation; strong fumes.
Wax
Wax adds sheen and a soft feel but offers minimal protection. It is often applied over other finishes.
Comparison Table
| Finish | Protection | Look | Ease | Odor |
|---|---|---|---|---|
| Oil | Low | Natural | Easy | Moderate |
| Oil blends | Low to moderate | Natural | Easy | Moderate |
| Wiping varnish | Moderate | Thin film | Easy | Moderate to strong |
| Oil-based poly | High | Warm amber | Moderate | Strong |
| Water-based poly | High | Clear | Moderate | Low |
| Shellac | Moderate | Warm | Moderate | Alcohol odor |
| Lacquer | Moderate to high | Smooth | Harder, often sprayed | Strong |
| Wax | Low | Soft sheen | Easy | Low to moderate |
These are general tendencies; products vary.
Choosing a Finish
- Tabletops and high-wear surfaces: Durable film finishes such as polyurethane
- Decorative pieces: Oils or oil blends
- Light woods where yellowing matters: Water-based finishes
- Quick projects: Fast-drying finishes
- Food-contact items: Choose finishes labeled for that use and follow instructions
Preparing the Surface
Good finishing starts with preparation:
- Sand progressively through grits
- Remove dust thoroughly
- Test the finish on scrap
Stains
Stains change color. Test on scrap from the same wood, since results vary. Pre-stain conditioners can help on blotch-prone woods.
Safety
- Work with good ventilation
- Wear gloves and eye protection
- Use respiratory protection appropriate for the product
- Keep finishes away from heat and flames
- Dispose of rags properly
Common Mistakes
- Skipping test pieces
- Applying thick coats
- Inadequate sanding
- Not allowing drying time
- Improper rag disposal
Questions to Ask Before Choosing a Finish
- How much wear, moisture and heat will the surface face?
- Do I want the wood to look natural, warmer or unchanged?
- Can I ventilate my workspace well enough for solvent-based products?
- How quickly do I need to finish the project?
- Will the piece contact food?
Testing on Scrap
Always make a test board from offcuts of the same wood. Sand it the same way as the project, apply stain if using it and apply the finish with the same number of coats. Label the board. Over time, a collection of labeled test boards becomes a valuable reference for future projects.
Maintaining Finishes
Oil finishes can be refreshed by applying more oil. Film finishes may need cleaning, light sanding and recoating when worn. Follow manufacturer guidance for maintenance and compatibility before recoating.
A Note on Food-Contact Items
For cutting boards, spoons and bowls, many woodworkers use finishes such as mineral oil or products labeled as suitable for food contact. Read labels carefully and follow cure time instructions. When in doubt, check guidance from the finish manufacturer.
Final Pre-Finish Check
- Surface sanded evenly and dust removed
- Test board finished and approved
- Ventilation and protective gear ready
- Rag disposal plan in place
- Drying area clean and dust-free
- Label instructions read
A Note on Sheen
Most finishes come in several sheens. Lower sheens hide small surface imperfections and fingerprints better, while higher sheens look glossier and show flaws more. Sheen is largely a matter of taste, so test it on scrap before finishing the whole piece.
Frequently Asked Questions
What is the most durable finish for beginners?
Polyurethane is durable and widely used.
Do oil finishes protect wood?
They offer limited protection compared with film finishes.
Water-based or oil-based polyurethane?
Water-based is clearer and lower odor; oil-based is warmer.
Can I put finish over stain?
Yes, once the stain is dry. Follow labels.
Why are oily rags dangerous?
They can spontaneously combust. Dispose of them properly.
The Bottom Line
Choose a finish based on durability, appearance and ease of application. Oils give natural looks, polyurethane gives strong protection, shellac seals and repairs easily and lacquer dries fast. Always test on scrap, follow labels and handle rags safely.
Editorial note: Joint Bench is independent and reader-supported. This guide is based on research into manufacturer documentation, published specifications and widely accepted best practices; we have not been paid to mention any product. If we add affiliate links in the future, they will be clearly disclosed per our Affiliate Disclosure.