Antique Furniture: 7 Common Mistakes That Reduce Value

Most damage to antique furniture is not caused by neglect. It is caused by care. A well-meaning afternoon with a tin of polish, a spell in a damp garage, a dab of wood filler to hide a chip — each of these can do more lasting harm than fifty years of ordinary use. And because the damage is usually invisible to the person doing it, it tends to be discovered years later, by a buyer or a valuer, when the piece has already changed hands for less than it should have.

None of this means you should be afraid of your furniture. It means the good instincts — clean it, fix it, tidy it up — need a little direction. Here are the mistakes that cost the most.

1. Stripping Back to “Bare Wood”

This is the single most expensive mistake in the book. An original finish — shellac, French polish, a simple waxed surface, even a crackled and worn one — is part of the object’s history. It carries the oxidised colour that only comes with age, the softened edges of long use, and often the only surviving evidence of how the piece was made and where.

Strip it off and you do not get a fresh start. You get a piece that looks new, and new is exactly what collectors are not paying for. A sympathetically conserved table will almost always hold up better than a refinished one, because the refinished version has lost the thing that cannot be recreated. If a finish is flaking or lifting, a conservator can usually consolidate it rather than remove it. If it is merely dull, clean it and wax it, and accept the wear as part of the story.

2. Cleaning Products That Do More Than Clean

There is an entire industry built on the idea that furniture needs feeding, nourishing and reviving. Very little of it helps.

• Silicone spray polishes. They leave a film that builds up over years, attracts dust, and can cause uneven patches if the piece is ever refinished. Silicone is notoriously hard to remove completely.
• Household multi-surface sprays and anything with bleach. These strip wax, lift shellac and can bleach colour out of the grain.
• Vinegar, lemon juice and acidic “natural” cleaners. Popular in cleaning guides, harsh on polished surfaces.
• Damp cloths and kitchen paper. Too wet, and mildly abrasive. Water left sitting on a waxed or polished top will bloom into a cloudy ring.
• Scratch-cover pens and tinted waxes. They rarely match, and the patch usually looks worse than the scratch.

The reliable method is duller than the alternatives and works. Use a barely damp cloth with a drop of mild washing-up liquid in warm water, wring it out properly, wipe, then dry immediately with a soft cloth. Wax sparingly — twice a year at most — with a good beeswax polish, working with the grain and buffing off the excess. There should never be a greasy film left behind.

3. Repairs With the Wrong Materials

Old furniture was built to be repaired. Joints were made with animal glue, which softens with heat and moisture, so a chair can be taken apart, cleaned and put back together decades later. Modern adhesives undo that. Polyurethane and epoxy glues are close to permanent, can stain surrounding wood, and mean the next repair involves cutting away good timber to get at the joint. If something is loose, a furniture restorer using reversible materials will do a better and cheaper job in the long run than a squeeze of whatever is in the shed.

The same applies to filler. A dollop of two-part wood filler on a chipped edge or a missing piece of veneer is a permanent, visible, wrong-coloured patch that a buyer will spot immediately. Small losses are often better left, or repaired with matching timber by someone who knows what they are doing. Keep the broken pieces, however small — they can sometimes be put back.

Then there are the modern screws, the metal brackets, the replacement hinges bought from a hardware shop. Every one of them is a new hole in old wood, and none of them can be undone.

4. Sanding, Planing and “Tidying Up”

Veneer on eighteenth- and nineteenth-century pieces is often barely a millimetre thick. A light pass with a sander to brighten a top can go straight through it, and the damage is irreversible. Over-sanding also rounds off the crisp edges of mouldings and legs, softening the very lines that identify a good piece.

The other common tidying-up mistake is cutting. A sticking drawer planed down, a tall chest reduced in height, a sideboard converted into a low media unit, a bureau with added shelves — all of these turn a collectable piece into furniture. Whatever the improvement is worth to you, it is worth nothing to the next owner, and the piece can never be put back.

5. Storing It Badly

Wood moves with the moisture in the air around it, so what furniture dislikes is change. A damp cellar, garage or unheated outbuilding will cause mould, warping, lifting veneer and rust on locks and hinges. A loft or an airing cupboard will dry the timber out until veneer splits and joints work loose.

Direct sun bleaches and fades wood, and heat from a radiator or a window in full sun does the same damage more quickly. Standing a piece directly on a damp concrete floor is a slow route to rot — raise it on battens. And do not wrap furniture in plastic sheeting or bubble wrap for anything longer than a move: it traps moisture against the surface. Old cotton sheets or acid-free tissue are far kinder.

As a rough rule, aim for a steady, moderate environment, out of direct sun, off the floor, with air able to move around the piece. If you are storing it for a long time, take drawers out, wrap them separately, and do not stack anything heavy on top.

6. Throwing Away the Evidence

Paper labels on the back, maker’s stamps, retailer’s plaques, original keys, escutcheons, handles, castors, glass, drawer linings and dust boards are all evidence, and evidence is value. Even a faded sale receipt or a handwritten family note adds to the story of a piece, and stories sell.

Keep loose parts in a labelled bag, and keep the bag with the furniture rather than in a drawer across the house. Never polish over a stamp or a brand. And before you clean, repair or move anything, take photographs — of the whole piece, the marks, the damage, the back and the underside. They cost nothing and settle a great many arguments later.

7. Handling and Everyday Wear

Furniture is usually harmed in transit. Lift a chest by its carcass, never by the top, the overhanging moulding or a single drawer rail. Take drawers, doors and loose shelves out first, and wrap them separately. Never drag a piece across a floor, however short the distance.

In daily use, the small habits matter: use coasters, because rings bloom into polished surfaces and do not always come out; do not tip chairs back on two legs; keep pot plants and vases off polished tops; and lift rather than slide anything across a waxed surface.

When in Doubt, Do Less

The safest order of operations with any piece of furniture is this: photograph it, identify it as best you can, clean it gently, stabilise anything that is loose or falling apart, and then stop. Almost every mistake in this list comes from doing more than was needed.

If a piece is genuinely old, potentially valuable, or carries family history, get a professional opinion before you touch it. A conservator accredited through the Institute of Conservation, a specialist at a reputable auction house, or an experienced restorer who works on period furniture will all be able to tell you whether a repair is worth doing and which materials are appropriate. An hour of advice is a great deal cheaper than a stripped, sanded, filled and converted heirloom.

Photo: Sóc Năng Động / Pexels