Cleaning and Maintaining Oil Finished Wood
Our oil finishes are simple, time tested formulas working on a basic premise. Naturally hardening oils penetrate the wood's surface, where they prevent moisture damage and the decomposition that follows prolonged exposure. A small amount of oil stays close to the surface, but we are not creating a film or a barrier across it.
That single fact determines everything about how you care for the piece.
When wear happens, it is happening to the wood itself, and the fine layer of finish sits right there at the exposed surface. There is no sacrificial coating taking the damage on the wood's behalf, and equally there is no coating to crack, cloud, or peel. So the goal over time is to keep that surface clean, free from dust and grime, and periodically refreshed rather than stripped of its oils.
Everything below follows from that. Feed it, do not strip it.
The maintenance ladder
Most questions we get about caring for oiled wood are really questions about which rung to be on. There are four, and you climb only as high as the problem requires.
- Keep it clean. Dusting, sweeping, wiping. Weekly to monthly, depending on use.
- Wash it with an oil soap. When cleaning alone stops being enough.
- Spot repair. For a scratch, a mark, a worn edge.
- A maintenance coat. When the whole surface looks dry or dull.
Nothing here involves stripping, sanding back, or starting over, at any rung. That is the entire advantage of the finish, and it holds for a floor, a countertop, a dining table, or a timber frame ceiling.
One: keep it clean
Light cleaning means keeping the surface free of dust, dirt, and grime. Periodic sweeping, dusting, and wiping prevents a layer of grime from forming in the first place, and prevention is far easier than removal.
Dust is worth taking seriously rather than treating as merely untidy. Accumulated dust holds moisture against the wood, and moisture held in contact with a surface is what slowly degrades it. A dusty timber in a humid room is a wetter timber than a clean one.
Nothing abrasive is needed at this rung. A cloth, a broom, a soft brush, or a pad.
Two: oil soaps
Sometimes dusting is not enough, and this is where oil soaps earn their place.
An oil based cleaner refreshes the wood rather than stripping it. It lifts dirt and grime, and it feeds moisture back into the pores at the same time. Think of it as a moisturizer for your wood surfaces.
Good options:
- Murphy's Oil Soap
- Ottosson Linseed Oil Soap
- Allbäck Linseed Soap
- Method Oil-Based Wood Soap
The simplest ones work best. They are typically sold as saponified linseed oil soap concentrate, and you can dilute with up to twenty parts water, so a small bottle goes a very long way. You are paying for the part that matters, the oil, rather than the part that takes up volume, the water.
Wring the cloth or mop out well. Damp, not wet. Standing water is never the goal on any wood surface, oiled or otherwise.
What not to use
This section matters more than the previous two, because the wrong cleaner does damage that dusting can never undo, and several of the worst offenders are the ones people reach for first.
Ammonia based glass and all purpose cleaners. They cut oils. That is precisely their job, and it is precisely the wrong job here.
Bleach. It attacks the wood itself, not only the finish.
Dish soap and degreasers. Formulated to strip oil off dishes. They will strip it out of your wood just as efficiently.
Vinegar. A folk remedy for everything, and acidic enough to dull an oiled surface over repeated use.
Steam mops. Heat plus moisture driven into wood under pressure. Bad for any wood floor and particularly bad for a penetrating finish.
Melamine foam erasers. They are a fine abrasive, not a sponge. They abrade the surface wherever you scrub.
Silicone based furniture polishes, meaning most aerosol spray polishes. This is the one worth remembering, because the damage is invisible until later. Silicone leaves a residue that penetrates the wood and is extremely difficult to remove, and any finish applied over it afterward will crawl and pit rather than lie down. Silicone does not just fail to help. It can compromise your ability to maintain the piece with oil ever again, which forfeits the main advantage of the finish.
If you are unsure about a product, the test is simple: does it dissolve oil? If so, do not use it on a surface whose protection is oil.
Three: spot repair
Scratches, scuffs, water marks, worn edges. All of these are local problems with a local solution.
Abrade the area lightly with a fine abrasive pad, rub in more finish, and buff out. The new oil merges with the old, because there is no film edge to feather, so the repair blends and disappears.
This is worth doing the first time on something inconspicuous, so you learn how little it takes. Most people over-treat their first repair.
For high traffic areas, chair arms, the front edge of a desk, the stretch of floor in front of the sink, spot maintenance is not a compromise. It is the correct approach. Treat the parts that get used, when they need it.
Four: a maintenance coat
When the whole surface looks dry or dull rather than damaged in one spot, it is time to feed the entire thing.
The signals. Water no longer beading. Color losing its richness. The surface looking thirsty, or feeling rougher under the hand than it did.
The procedure. Clean the surface, let it dry, rub in another coat of finish, and wipe off everything that does not soak in. No sanding, no stripping, no preparation beyond cleaning. For furniture and countertops, a buffed coat of Liquid Wax End Sealer afterward restores sheen and water resistance.
How often. This varies enormously and the wood will tell you long before a calendar will. Interior surfaces in a stable, conditioned space can go years, and in some climates up to a decade. Exterior surfaces need attention as often as annually on hard exposures and typically every two to three years elsewhere. Floors and countertops fall somewhere in between and depend entirely on traffic and use.
By surface
Floors. Sweep and dust regularly. Oil soap for washing. Green Scotch-Brite pad with oil soap for scuffs, or with Concentrated Finishing Oil for worn areas, then buff dry. Felt pads under furniture legs, and lift rather than drag.
Countertops and butcher block. Wipe with a damp cloth and mild soap. Re-oil more often than you would furniture, since these surfaces are washed constantly and get the hardest use in the house.
Furniture. Dust normally. Oil soap when it needs more. A buffed coat of Liquid Wax restores sheen without a full re-oiling and is the fastest way to bring a piece back.
Interior timbers and ceilings. These need very little. Dust them when you can reach them, and a coat of Liquid Wax on a frame that has gone dry and dull will bring it back without any stripping or sanding.
Exterior. Wash to remove dirt, pollen, and organic growth before any maintenance coat. Never oil over mildew, or you seal it in and it keeps growing underneath.
Safety: oily rags will start a fire
This applies whenever you move up to rungs three or four and finish is involved.
Natural drying oils generate heat as they polymerize. That is the reaction hardening the finish in your wood, and it happens just as readily in a wad of cloth. A pile of oil soaked rags holds its own heat, the temperature climbs, and it can ignite with no spark and no flame nearby.
Lay used rags flat and separated on a non combustible surface outdoors until stiff and fully dry, submerge them in water in a sealed metal container, or use a listed oily waste can. Never heaped in a bin, never in a pocket.
The long view
A film finish has a service life and then a failure. An oiled surface has a rhythm and no particular end. The pieces that look best after twenty years are not the ones that were finished most heavily at the start. They are the ones somebody kept feeding.
- Questions about a particular surface, a stubborn mark, or whether it is time for a maintenance coat? Call us at 541-844-8748 or write info@heritagenaturalfinishes.com.
- This article grew out of an earlier version written by Ziggy Liolia, whose framing of the whole subject, that maintenance means refreshing rather than stripping, is still the backbone of it.
- Further reading. Two books, from different directions. Cheryl Mendelson's Home Comforts: The Art and Science of Keeping House is the best book we know on caring for the things you live with, and it takes the subject far more seriously than most. And Paula Baker-Laporte and John C. Banta's Prescriptions for a Healthy House works the other end of the problem, what you bring into a house to begin with. If the section above on what not to use struck you as worth thinking about further, that is the book that thinks about it properly.