The Complete Guide to Painting Woodwork: Gloss vs Eggshell

Woodwork is the frame around every room. Skirting boards, architraves, door frames, window frames, picture rails, dado rails, and the doors themselves: collectively, they define the character of a space. Paint them well and a room looks finished, considered, and cared for. Paint them poorly and no amount of beautiful wall colour can compensate.

This guide covers every aspect of painting interior woodwork, from surface preparation through primer systems to the final finish coat. We also address the question that sparks more debate in London's decorating world than almost any other: should woodwork be painted in gloss or eggshell?

Why Woodwork Matters

In London's period properties, from the Georgian townhouses of Mayfair to the Victorian villas of Holland Park, woodwork is often the most detailed and crafted element in a room. A six-panel door from the late eighteenth century is a piece of joinery, with carefully proportioned panels, moulded edges, and precise geometry. Original skirting boards in a Regency house might feature ogee or torus profiles that catch light and shadow beautifully when properly painted.

Modern woodwork is typically simpler, with flat-fronted doors and plain skirting profiles, but the principles of good painting remain the same. The goal is always a smooth, even, durable finish that enhances the timber beneath.

Preparation: Where the Real Work Happens

Professional decorators spend far more time preparing woodwork than painting it. On a typical door, preparation might account for sixty to seventy percent of the total time. This is where the quality of the finished result is determined, and it is where amateur work most often falls short.

Assessment

Before any work begins, assess the condition of the woodwork:

• Is the existing paint sound? Does it adhere well to the surface, or is it peeling, cracking, or flaking? Sound paint can be sanded and painted over. Failing paint needs to be removed.
• Is the surface smooth? Run your hand over the surface. Can you feel brush marks, drips, or ridges from previous paint jobs? These need to be sanded smooth.
• Is there any damage? Chips, dents, scratches, and holes need to be filled before painting.
• Is there any rot? Soft, spongy wood, particularly around window frames and external door frames, indicates rot that must be repaired before painting.
• What is under the existing paint? In properties built before 1960, there may be lead paint beneath the surface layers. This requires specific handling.

Cleaning

All woodwork should be cleaned before sanding. A solution of sugar soap and warm water removes grease, nicotine, cooking residue, and general grime that would otherwise prevent the new paint from adhering. In kitchens, this step is particularly important because cooking grease creates an invisible film that paint will not stick to.

Sanding

Sanding serves two purposes: it creates a mechanical key for the new paint to grip, and it smooths the surface by removing imperfections in the existing paint film.

For woodwork in reasonable condition, 120-grit sandpaper is appropriate for the initial sand, followed by 180 or 240-grit for a smoother finish. Always sand in the direction of the grain on visible timber, and in the direction of the previous brush strokes on painted surfaces.

Between coats of paint, a light sand with 240 or 320-grit paper removes any nibs (tiny bumps caused by dust particles landing in wet paint) and provides a key for the next coat. This inter-coat sanding is one of the most frequently skipped steps by amateur decorators, and one of the most important for achieving a professional finish.

Filling

Small holes, dents, and chips should be filled with a suitable filler. For interior woodwork, a fine surface filler such as Toupret or Ronseal works well. Apply it slightly proud of the surface, allow it to dry fully, then sand it flush.

For deeper damage or areas where wood has been lost, a two-part wood filler provides a stronger, more durable repair. Ronseal High Performance Wood Filler and Bonda wood repair products are both reliable choices that sand well and take paint without showing through.

Dealing with Old Lead Paint

Any property built before 1960, and many built before 1980, may have lead paint on woodwork. Lead paint in good condition, where it is not flaking or accessible to children, does not necessarily need to be removed. It can be painted over safely with modern paint after proper preparation.

However, if lead paint is deteriorating, or if the woodwork is being stripped for restoration purposes, lead paint removal must be handled with appropriate precautions:

• Do not use heat guns to strip lead paint, as heating lead paint releases toxic fumes.
• Chemical strippers are the preferred method. Products such as Peelaway or SmartStrip are effective and contain the lead-contaminated waste.
• Wet sanding is acceptable for minor preparation, as the water suppresses dust. Dry sanding lead paint should be avoided.
• Dust containment is essential. Seal the room, use dust sheets, and clean thoroughly after work is completed.
• Disposal. Lead paint waste should be disposed of as hazardous waste, not placed in general builder's skips.

If you are uncertain whether old paint contains lead, testing kits are available from most hardware suppliers, or a professional survey can be arranged. In Belgravia, Mayfair, and other areas with predominantly pre-war housing stock, lead paint is extremely common and should always be assumed unless tested.

Primer Systems: The Foundation of a Good Finish

Primer is the unsung hero of woodwork painting. It seals the surface, provides adhesion for subsequent coats, blocks stains and tannins, and creates a uniform base colour that ensures the topcoat reads true.

When Primer Is Essential

• Bare wood. Always prime bare wood before painting. Wood is porous and will absorb paint unevenly without a primer, leading to a patchy, uneven finish.
• Stained wood. Knots, water stains, nicotine, and marker pen will bleed through ordinary paint. A stain-blocking primer such as Zinsser BIN (shellac-based) or Zinsser Bulls Eye 1-2-3 (water-based) seals these stains and prevents them from reappearing.
• Previously glossed surfaces. While not strictly a primer issue, an undercoat over sanded gloss provides better coverage and adhesion for the topcoat.
• MDF. Medium-density fibreboard absorbs paint aggressively, particularly at cut edges. A dedicated MDF primer, or two coats of standard acrylic primer, seals the surface effectively.

Primer and Undercoat Products

• Zinsser BIN. Shellac-based, fast-drying, and the best stain blocker available. It seals virtually anything and dries in less than an hour. The odour is strong, so ventilation is important.
• Zinsser Bulls Eye 1-2-3. Water-based, low odour, good adhesion, and adequate stain blocking for most situations. Easier to work with than BIN but not as effective on heavy stains.
• Dulux Trade Undercoat. The traditional white undercoat that provides opacity and a smooth base for the topcoat.
• Farrow & Ball Primer & Undercoat. Colour-matched to their paint range, which reduces the number of topcoats needed for full coverage, particularly with darker colours.

The Gloss vs Eggshell Debate

This is the question that defines modern woodwork painting in London. For most of the twentieth century, the answer was simple: woodwork was painted in oil-based gloss, full stop. The high shine, extreme durability, and smooth levelling of traditional oil-based gloss made it the obvious choice.

Over the past twenty years, however, eggshell has steadily displaced gloss as the preferred finish for interior woodwork in London's premium properties. Here is the case for each.

The Case for Eggshell

Aesthetics. Eggshell has a soft, subtle sheen that is contemporary, understated, and elegant. It does not dominate a room or compete with the wall colour. In period properties, eggshell allows architectural details like panel mouldings and cornices to be read through shadow and form rather than through reflection.

Consistency with walls. When walls are painted in a flat or matt emulsion, high-gloss woodwork can create a jarring contrast. Eggshell woodwork sits more harmoniously alongside matt walls, creating a cohesive, considered scheme.

No yellowing. Water-based eggshells do not yellow over time, which is a significant advantage over traditional oil-based gloss. White woodwork stays white, year after year.

Low odour. Water-based eggshells have minimal odour during application and virtually no odour once dry. This matters in occupied London properties where families may be living in the house during decoration.

Fast drying. Water-based eggshell dries to the touch in one to two hours and can receive a second coat in four hours. Oil-based gloss requires sixteen to twenty-four hours between coats, significantly extending project timelines.

The Case for Gloss

Durability. Oil-based gloss forms an extremely hard film that resists scratching, scuffing, and impact better than most eggshells. For high-traffic woodwork, skirting boards in busy hallways, or doors that are frequently handled, gloss offers superior long-term performance.

Depth and richness. High-gloss paint has a depth and lustre that eggshell cannot replicate. Dark colours, in particular, look richer and more saturated in gloss. A front door in Farrow & Ball "Hague Blue" or "Railings" in full gloss has a jewel-like quality that eggshell cannot achieve.

Period authenticity. In Georgian and Regency properties, woodwork was historically finished in oil-based paint with a high sheen. For strict period restoration work, gloss is the authentic choice.

Self-levelling. Traditional oil-based gloss has a long "open time," meaning it stays wet and workable for an extended period. This allows brush marks to flow out naturally, producing a smoother finish. Water-based eggshells dry faster and can show brush marks if not applied skilfully.

Our Recommendation

For most interior woodwork in London homes, we recommend a high-quality water-based eggshell. Products like Little Greene Intelligent Eggshell, Farrow & Ball Modern Eggshell, and Benjamin Moore Advance (in a satin or semi-gloss sheen) offer excellent durability, beautiful finishes, and practical advantages that make them the right choice for the vast majority of projects.

We reserve gloss for specific applications: front doors, where the traditional high-shine look is desired; external woodwork, where maximum weather resistance is needed; and period restoration projects where historical accuracy is the priority.

Our woodwork painting service includes advice on the right finish for every element of your joinery, tailored to the age of your property, the style of your interior, and the practical demands of daily life.

Achieving a Factory-Smooth Finish

The ultimate goal in woodwork painting, whether gloss or eggshell, is a finish so smooth and even that it looks as though it was applied in a factory rather than by hand. Here is how professionals achieve it.

The Coat System

A proper woodwork finish involves multiple coats, each with a specific purpose:

1. Primer on bare or stained areas.
2. Undercoat to build opacity and provide a smooth base. One or two coats depending on the colour change.
3. Light sand with 240 or 320-grit between each coat.
4. Topcoat one. The first finish coat, applied thinly and evenly.
5. Light sand to remove any nibs or dust.
6. Topcoat two. The final coat, applied with care to achieve a smooth, even finish.

Cutting corners on this process, skipping the undercoat, skipping inter-coat sanding, or applying a single thick topcoat instead of two thin ones, always shows in the finished result.

Brush Selection

For traditional brush application, the brush matters enormously. Professional decorators typically use synthetic brushes for water-based paints and natural bristle brushes for oil-based paints. Purdy, Hamilton, and ProDec all make excellent brushes in various sizes.

For cutting in around glass, a 38mm angled brush provides precision. For flat panels and rails, a 50mm or 63mm brush allows faster coverage with fewer brush strokes. For skirting boards, a 50mm brush is standard.

Roller and Tip-Off Technique

For large flat areas, such as flush doors or flat skirting boards, a combination of rolling and tipping off can produce a smoother result than brushing alone. Apply the paint with a small foam or short-pile mohair roller for even coverage, then immediately "tip off" with a dry brush, drawing it lightly across the wet paint in one direction to eliminate roller stipple and leave a smooth finish.

Spray Application

For the absolute smoothest finish, spray application is unbeatable. Airless or HVLP spraying applies paint in a fine, even mist that levels perfectly, producing a factory-quality finish with no brush marks or roller stipple. Spray application is particularly effective on doors, built-in cabinetry, and radiators.

The trade-off is preparation time. Everything that is not being sprayed must be carefully masked and protected, which can take longer than the spraying itself. For individual elements like doors, it is often most efficient to remove them, spray them in a clean workshop environment, and rehang them once dry.

Our door painting service includes both traditional brush application and spray finishing, and we advise on the best approach based on the number of doors, the desired finish quality, and the practical constraints of working in an occupied property.

Common Woodwork Painting Mistakes

Having painted thousands of metres of woodwork across London, we see the same mistakes repeatedly. Avoiding these will dramatically improve your results:

Insufficient preparation. This is the number one cause of poor woodwork finishes. Every hour spent on preparation saves time and frustration later.

Too few coats. Two thin coats always look better than one thick coat. Thick coats sag, drip, and take longer to dry.

Not sanding between coats. Five minutes with fine sandpaper between coats makes a noticeable difference to the final smoothness.

Painting in direct sunlight. Sun heats the surface and causes paint to dry too fast, leading to poor levelling and visible brush marks. In south-facing rooms, work in the morning or evening.

Ignoring the weather. On very humid days, water-based paints dry slowly and may sag. On very cold days, paint may not cure properly. The ideal temperature range for painting is ten to twenty-five degrees Celsius.

Overloading the brush. Dip the brush about a third of the way into the paint, then tap off the excess. Do not wipe the brush on the rim of the tin, as this removes too much paint and creates an inconsistent application.

Not maintaining a wet edge. Work systematically, always painting into a wet edge. If you allow paint to dry and then overlap it with wet paint, the overlap will show as a ridge.

Specialist Woodwork Considerations

Sash Windows

Sash windows deserve special mention because they are among the most technically demanding elements to paint. The correct sequence for painting a sash window involves opening and closing the sashes in a specific order to access all surfaces and prevent the window from being painted shut. A professional decorator will know this sequence instinctively. An amateur often ends up with a window that is glued closed, requiring careful freeing with a putty knife.

Panelled Doors

Six-panel doors should be painted in a specific order: panels first, then horizontal rails, then vertical stiles. This sequence minimises visible brush marks at the junctions between elements and ensures the grain direction of the brush strokes follows the grain direction of the timber.

Radiators

Radiators should be painted with the heating turned off and the radiator cold. Painting a warm radiator causes the paint to dry too quickly, leading to a rough, uneven finish. Specialist radiator paint, or standard eggshell applied thinly, provides the best results. Avoid thick applications, which can reduce the heat output of the radiator.

The quality of woodwork painting is one of the most visible indicators of a professional versus amateur paint job. It is the element that visitors notice first and remember longest. Investing in proper preparation, quality materials, and skilled application pays dividends in both the appearance and the longevity of the finish.