TL;DR
The single most damaging thing you can do to an antique is wipe it with something containing alcohol -- shellac, the dominant furniture finish before roughly the middle of the twentieth century, dissolves on contact with it. On old pieces the original surface is a large part of the value, so the rule is to clean the least amount that gets the job done, and to test every product in a hidden spot first.
The value is in the surface
Collectors and appraisers use the word patina to describe the accumulated character of an old finish -- the slight darkening, the softened sheen, the wear on the arms of a chair where hands went for a hundred years. That surface is original material, and it cannot be put back.
This changes the goal completely. On modern furniture the aim is a clean, uniform look. On an antique the aim is to remove dirt without removing history, which usually means stopping earlier than instinct says to stop. Stripping and refinishing a period piece can significantly reduce what it is worth.
Source: furniture appraisal and conservation practice guidance.
Which finish are you dealing with?
Most pre-1920s furniture is shellac. Roughly the 1920s through the 1950s is often lacquer. Post-war and modern pieces are usually polyurethane or a catalyzed varnish. Wax over any of them is common, and oil finishes turn up throughout.
You can narrow it down without any chemistry. In a hidden place -- the underside of a table leaf, the back of a leg -- put a drop of denatured alcohol on a cotton swab and touch it briefly. If the finish gets sticky or the swab picks up color, it is shellac. If nothing happens, it is something tougher.
Do that test in a spot nobody will ever see, and understand that a positive result means you have just softened a small patch. That is the price of knowing, and it is worth paying before you clean a whole cabinet.
The safe default routine
Dust dry, first and often. A soft brush and a vacuum with the nozzle held near but not touching the surface removes grit without dragging it. Grit is what puts fine scratches into a two-hundred-year-old surface.
For anything the dry pass will not take, a cloth barely dampened with plain water, wrung until it does not feel wet, worked in a small area, then dried at once. If water alone is not enough, add the smallest amount of mild dish soap -- a drop in a bowl -- and follow with a plain-water wipe and a dry cloth.
Work in sections roughly the size of your hand and never let a section stay damp. That is the same core method used on modern sealed furniture, described in cleaning sealed wood furniture, just done more cautiously.
What never touches an antique
| Never use | What it does |
|---|---|
| Denatured alcohol, rubbing alcohol, hand sanitizer | Dissolves shellac immediately and permanently |
| Ammonia glass cleaner | Clouds and softens old finishes; darkens some woods |
| Vinegar or lemon cleaners | Acidic; dulls and etches aged finishes |
| Disinfecting wipes | Most contain alcohol; the damage is often invisible until it is not |
| Silicone furniture polish | Contaminates the surface and makes future conservation work difficult |
| Melamine sponges or any abrasive | Cuts straight through a thin aged film |
| Steam or wet cleaning | Lifts veneer glue and swells joints |
| Paint stripper or refinishing kits | Removes the original surface, which is the value |
Alcohol is the one to burn into memory, because it arrives in the house through so many doors. Hand sanitizer set down on a shellac table leaves a permanent white or sticky mark within seconds.
Old wax and old polish
Many antiques carry decades of accumulated paste wax and furniture polish. That layer goes dark and cloudy over time, and cleaning it back is usually what makes a piece look dramatically better without touching the finish at all.
A soft cloth with a small amount of mineral spirits will lift old wax on most finishes and is generally gentler on shellac than alcohol-based products -- but it still gets tested in a hidden spot first, and used with real ventilation and no open flame. Work small, change cloths as they load with brown residue, and stop when the surface looks even rather than chasing perfection.
If the piece looks hazy rather than dirty, the cause is very likely product buildup, which is explained in what furniture polish leaves behind.
Reviving, not refinishing
Once the surface is clean, a thin coat of a quality paste wax buffed out gives protection and a soft sheen without adding a film that has to be removed later. Wax is reversible, which is exactly why conservators favor it.
Apply sparingly with a soft cloth, let it haze, then buff. Once or twice a year is plenty. The difference between wax care and oil care, and why mixing the two causes problems, is in oiled versus waxed care.
Veneer, inlay, and loose parts
Old veneer is thicker than modern veneer but the glue underneath is often hide glue, which is water soluble. Moisture at a seam can release it, and a bubble or a lifted edge is a repair job rather than a cleaning one. Keep cloths off edges and inlay lines, and see veneer and its glue lines for the specifics.
Interior surfaces -- drawer interiors, case backs, the undersides of tops -- are usually bare wood even on a finished piece, and those follow the rules in cleaning unfinished wood.
FAQ
Can you use alcohol to clean antique furniture?
No. Shellac, the most common finish on older furniture, dissolves in alcohol on contact, leaving a sticky or whitened patch that only refinishing will fix. That includes rubbing alcohol, denatured alcohol, hand sanitizer, and most disinfecting wipes.
What is the safest cleaner for antique wood?
Plain water on a cloth wrung until it is barely damp, dried immediately, handles most household soil. If more is needed, add a single drop of mild dish soap to a bowl of water, then rinse with a plain-water cloth. Test any product in a hidden spot first.
Does cleaning an antique reduce its value?
Gentle cleaning does not; refinishing usually does. The original surface, including its patina and honest wear, is part of what appraisers value. Removing dirt is fine. Removing or replacing the finish is what costs money.
How do I tell if my furniture is shellac?
Touch a cotton swab dampened with denatured alcohol to a hidden area for a second or two. If the finish turns sticky or color transfers to the swab, it is shellac. If nothing changes, it is a more modern and more chemical-resistant finish.
Should I use furniture polish on antiques?
Skip aerosol and silicone polishes. They build a film, attract dust, and complicate any future conservation work. A thin coat of paste wax buffed out once or twice a year gives better protection and is reversible, which is why conservators prefer it.
What do I do about white rings on an old table?
Go slowly, because on shellac the usual home remedies can make it worse. A light haze is sometimes moisture trapped in the finish and may respond to gentle warmth or a wax treatment. Anything deeper, on a piece with real value, is a conservator conversation.
When the whole house is the problem rather than one task, recurring house cleaning services are the wider option.
Old furniture rewards a light hand -- dust often, wet rarely, and test everything somewhere nobody looks. Every home is different, so what a full clean covers depends on size, condition, and what you want included. Get a quote and we will walk you through it.