Fixing a Chip, Scratch or Dent

Three different materials, three different urgencies. The first decision is not how to repair it but whether it is cosmetic or whether it is a clock starting.

Triage in ten seconds

• Coated steel, through to bare metal: urgent. Exposed steel in a normal room starts corroding, and corrosion travels under the coating. Deal with it this week.
• Coated steel, scratch in the coating only: cosmetic. If no metal is showing, nothing is progressing.
• Concrete, chip or scratch: cosmetic, unless the sealer is broken over a large area, in which case staining becomes possible.
• Oiled wood, dent or scratch: cosmetic and often reversible. Nothing is progressing.
• Any crack through a section, any loose joint: stop. That is structural, not a finish repair.

Coated steel

The goal is to seal the exposed metal, not to make the repair invisible. Powder coat is fused in an oven, so there is no home process that reproduces it. Accepting that up front produces a better result than chasing invisibility and making a mess.

1. Clean the chip and let it dry completely.
2. If there is any rust, remove it mechanically with the finest abrasive that works, staying on the chip rather than spreading onto sound coating.
3. Apply a small amount of a suitable touch-up paint with a fine brush, built up in thin layers rather than one thick blob. A proud blob catches light and reads worse than the chip did.
4. Leave it alone to cure properly.

On edges, which is where chips almost always are because that is where any sprayed film is thinnest, keep the repair tight. Powder coat chip repair has the full method and steel furniture and rust covers prevention.

On a piece like the Stool No. 1 that gets knocked by shoes, expect edge chips over the years. They are the normal wear pattern on coated steel, not a fault.

Cast concrete

Concrete chips at corners when something hard hits it. Structurally this is almost always irrelevant: a 60 mm slab losing a corner fragment has lost nothing that was carrying load.

The decisions are cosmetic. Many people leave chips, because a chipped edge on cast concrete reads as the material being itself rather than as damage. If a repair is wanted, a colour-matched filler can be worked in, and it will be visible at close range.

What matters more is the sealer. If a chip has broken through the sealed surface, that area can now absorb wine and oil. Reseal the exposed spot. Sealing cast concrete furniture covers the product and method, and hairline cracks in concrete explains which cracks are normal and which are not.

Oiled wood, where the news is good

This is the one material where a home repair can genuinely disappear.

Dents. If the fibres were compressed rather than cut, they can be swollen back. Place a damp cloth over the dent and apply heat briefly with an iron. The moisture turns to steam, the fibres take it up and expand. Repeat in short bursts rather than cooking it. This works on dents and does nothing for cuts, because cut fibres are severed rather than squashed.

Scratches. Sand locally with a fine grit, always along the grain, feathering outwards so there is no hard edge to the sanded area. Then re-oil the patch and blend into the surrounding surface. An oil finish is uniquely forgiving here because it penetrates rather than forming a film, so there is no lap line.

Water marks. A white ring is usually moisture trapped in the finish rather than damage to the timber, and gentle warmth often clears it. A dark mark has reached the wood and needs sanding. Oiled ash furniture care has the detail.

Linoleum

Colour runs through the material, so a light scratch is a texture change rather than a different colour. Rubbing with a soft cloth often reduces it, because linoleum is slightly thermoplastic and responds to gentle friction. Deep gouges are permanent. Linoleum tabletop care covers the rest.

Where to stop

Three situations where the right move is to ask rather than to proceed.

• Anything structural. A crack through a section, a weld that has opened, a joint that moves under hand pressure.
• Hand-applied art. There is no matching touch-up, because the colour was mixed and applied once under a clear layer. Caring for a piece with art on it explains what is and is not possible.
• A large area. Local repairs blend. Half a panel does not, and a half-done refinish is harder to fix than the original damage.

Reality check

• Bare steel is a clock. Everything else is cosmetic.
• Powder coat repairs stabilise rather than restore. Thin layers, not a blob.
• Concrete chips are usually fine to leave. Reseal the exposed area.
• Compressed dents in wood steam out. Cut fibres do not.
• Stop at structure, at hand-applied art, and at anything larger than a local patch.