How do you repair scratches and dents in wood?
Tips & maintenance · Repairing
RepairingRepairing scratches and dents
A dent is compressed wood that you can make swell back up. A scratch is wood that has been removed and has to be filled. That difference decides everything.
- Dent: steaming
- Scratch: filling or sanding
- The finish determines the approach
First look at what it is
Run your fingernail over the damage. If it catches, material is missing. If not, the wood has been compressed.
With a dent, the wood fibres are pressed in but not removed. Moisture and heat make those fibres swell again — so the classic trick with a damp cloth and an iron really works, and often surprisingly well. At least on solid wood; veneer or lacquered wood is a different story.
With a scratch, wood is missing. Swelling will not help: you either sand the surrounding area down to the level of the scratch, or you fill the scratch. Which of the two depends on the depth and on how large the surface is.
And then there is the finish. If the damage is only in the lacquer or oil film and not in the wood, the repair is much simpler: touching up the coat is enough. So first look at it at an angle against the light — then you can see whether the scratch goes through the coat.
An oiled surface can be sanded locally and re-oiled without a visible transition. With lacquer or varnish, every local repair shows in the sheen — there you have to redo the whole surface.
- Dent
- fibres pressed in — steam
- Scratch
- material missing — fill or sand
- Only in the coat
- touching up the finish is enough
- Oiled surface
- can be touched up locally
- Lacquered surface
- redo the whole surface
- Veneer
- careful: sometimes only 0.6 mm thick
- Filler colour
- always test first in an inconspicuous spot
To be fair: every repair is a compromise. Steaming works but sometimes leaves a faint water ring; filling leaves a spot that takes stain differently; sanding through makes the board locally thinner. On an old, well-worn piece of furniture, the scratch is often less distracting than the repair — there is no shame in leaving a dent.
In pictures · Steaming out a dent
Schematic drawing.
Steaming out a dent
- Open up the finishIf there is lacquer on it, sand it away locally — steam cannot get through a closed coat. With oiled or untreated wood you can go straight on.
- MoistenA few drops of water on the dent, and let them soak in briefly. With a deep dent you can prick a few tiny holes with a needle so the moisture reaches the fibre faster.
- Damp cloth on topLay a well-wrung cotton cloth over the spot.
- IronOn a medium setting, without the steam function. A few seconds at a time, in small circular movements, checking each time.
- RepeatThe dent usually rises step by step. Stop as soon as the wood starts to darken or scorch.
- Let it dry and finishLet it dry completely, sand lightly with 220 grit and touch up the finish.
Veneer is often only six tenths of a millimetre thick and is glued onto a substrate. Steam can soften that glue and make the veneer blister. With veneer you work dry: fill and colour in.
Getting rid of a scratch
| Depth | Approach | Note |
|---|---|---|
| Only in the lacquer | polish or touch up the coat locally | visible on high gloss; then the whole surface |
| Shallow in the wood | lightly sand the whole surface | never sand just the scratch — that leaves a hollow |
| Medium depth | fill with filler or sawdust mixed with glue | test the colour first; filler takes stain differently |
| Deep | wood filler or a glued-in sliver | a sliver of the same wood is the least visible |
| In veneer | fill and colour in, do not sand | sanding through means you go right through the veneer |
| On an oiled top | sand back and re-oil | the most forgiving situation of all |
The most important rule when sanding: always work over a larger area than the damage, with a sanding block and along the grain. If you sand only the scratch with your fingers, you create a shallow hollow that you only see when the light falls on it at an angle — and then you can no longer get it out.
Prevent and limit
Felt pads under everything
Under chair legs, vases and dishes. Most scratches on a tabletop come from something that was slid across it.
Choose the finish for the use
A top that is worked on every day is better oiled than lacquered: then touching up can be done locally.
Hard species for wearing surfaces
Oak, ash and beech resist scratches better than spruce or pine. On a soft species, everything leaves a mark.
Accept patina
A used wooden top should look used. Removing every scratch turns a piece of furniture into a museum piece — and a thinner one.
Frequently asked questions about scratches and dents in wood
How do I get a dent out of wood?
With moisture and heat: a few drops of water, a damp cloth over it and briefly go over it with an iron on a medium setting without steam. The compressed fibres then swell up again.
Does steaming work on veneer too?
No. Veneer is wafer-thin and glued onto a substrate; steam can soften that glue and make the veneer blister. With veneer you fill and colour in.
How do I know whether it is a scratch or a dent?
Feel with your fingernail. If it catches, material is missing — a scratch. If it feels smooth but pressed in, it is a dent.
Can I sand away just the scratch?
No, then you create a hollow that you will always see in raking light. Sand over a larger area, with a sanding block and along the grain.
Can I repair a lacquered top locally?
Rarely invisibly. With lacquer or varnish, the sheen of the repair always differs; usually the whole surface has to be redone.
Which filler takes stain best?
Sawdust from the same wood mixed with wood glue comes closest. Test any ready-made filler first in an inconspicuous spot.
Other repairs
Cracks, water damage and the maintenance that prevents damage.
Have a question about your project? Just ask — we're happy to help.
Photo via Wikimedia Commons: Fine scratches in a wooden floor, seen at an angle against the light — photochem_PA, CC BY 2.0