DIY GUIDE · VEHICLES & TRANSPORT · CHECKED OCTOBER 2026
How to repair a car scratch yourself
An hour to a weekend. €11–€81 in materials, from a scratch remover to primer, colour and clear.
Fingernail test first; polish what is in the clear coat, build thin layers where colour is gone, prime bare metal.
- Every step, start to finish
- Checked October 2026 — sources at the end
- Honest about when to call a pro
FIRST, THE HONEST ANSWER
Do it yourself, or get a repairer?
Do it yourself if…
- The scratch is shorter than your hand and on a flat or gently curved part of a panel
- Your fingernail does not catch in it, or catches only slightly, so it is in the clear coat or just into the colour
- You have the car's paint code and can buy colour-matched touch-up paint or aerosol
- You have a dry, still, sheltered space at room temperature for drying between coats
- You are content with a repair that is good from a metre away rather than invisible under a torch
Get a pro if…
- The scratch is long, crosses a body line or more than one panel, or the panel is dented
- The paint is metallic or pearl in a large area, where blending is very hard by aerosol
- There is rust bubbling under the paint around the scratch
- The damage is on a bumper sensor, a camera or around parking-sensor holes
- The car is new, leased or high-value, and the finish has to match exactly
Safety first
- Use one-pack aerosols at home. The safety regulator warns that isocyanates, found in two-pack spray paints and lacquers, can cause respiratory sensitisation and occupational asthma; they are for spray booths and air-fed breathing equipment.
- Wear a respirator with combined vapour and particle filters, nitrile gloves and glasses when spraying or sanding, and work outdoors or in a well-ventilated space.
- Read the hazard label and the safety data sheet. The safety regulator's advice for vehicle repair chemicals is to know the hazards, protect skin and eyes, and never clean your hands with solvent.
- Keep aerosols and solvents away from flames, heaters and cigarettes, and never puncture or heat a can.
- Keep children and pets away while you spray and until the area is aired.
- Store cans upright at the temperatures on the label, out of direct sun and frost.
| MATERIAL | COVERAGE | FOR THIS JOB |
|---|---|---|
| Scratch remover or fine compound | A small amount on a pad for each pass | One bottle for many repairs |
| Touch-up paint to your paint code | Brush bottle or pen for chips and fine scratches | One |
| Primer aerosol | Etch or anti-rust for steel, plastic primer for bumpers | One can for a small repair |
| Colour aerosol to your paint code | Several thin coats | One can for a small repair |
| One-pack clear lacquer aerosol | Two coats with a flash-off between, as its sheet sets | One can |
How much clear do you need?
Cans = area to clear including the blend ÷ coverage per can, rounded up. A scuff 20 × 30 cm blended into an area 40 × 60 cm is 0.24 m²; with a clear that covers 1.6 m² a can in theory, one can is plenty, even allowing for overspray.
Real coverage from an aerosol is far below the theoretical figure, because much of the spray misses. Buy one spare can of colour if you are blending a larger area; a can that runs out halfway leaves a visible edge.
Wash and dry the area, then draw a fingernail slowly across the scratch. If it does not catch, the scratch is in the clear coat, and a scratch remover or compound will usually take it out. If it catches, the scratch is through to the colour or deeper, and it needs paint. If you can see grey, white or bare metal at the bottom, it needs primer first.
These are fine abrasives in a cream that level the clear coat around a shallow scratch until it disappears. The one we read works by hand or on a dual-action pad, with more pressure on the mark and less as it breaks down. Colour-tinted versions fill a little too, but the fill washes out over time.
Every car has a paint code on a label, often in a front door shut, under the bonnet or in the boot. Buy touch-up paint and aerosols by that code, not by the colour name. Several shades often share a name, and metallics vary between factories.
A brush bottle suits stone chips and short, narrow scratches. A pen is quicker but lays a thinner line. An aerosol suits a wider scuff where a brush would leave visible blobs, but it needs masking, sanding and blending. Most aerosol repairs need three cans: primer, colour and clear.
The colour coat on most modern cars has no gloss of its own and needs clear lacquer over it. Use a one-pack aerosol clear at home. Two-pack clears and paints contain isocyanates, which the safety regulator says can cause occupational asthma; they are made for spray booths with air-fed masks.
Bare steel needs an etch or anti-rust primer before colour, or the repair will lift. Bare plastic bumpers need a plastic primer. A filler primer builds up a shallow scratch so it can be sanded flat before colour.
THE PART THAT DECIDES THE FINISH
Preparing the scratch — by how deep it goes
Wash the area, dry it, and do the fingernail test in good daylight. Then find your scratch below and do its list before you open any paint.
A scuff in the clear coat only
Your fingernail does not catch.
- Wash the area with car shampoo and dry it
- Mask the edges of nearby trim and rubber
- Wipe the area with panel wipe so the compound works on bare clear coat
- Work the scratch remover by hand first; move to a machine only if hand work stalls
A scratch through to the colour
Your fingernail catches, but there is no grey or metal at the bottom.
- Find the paint code and buy touch-up paint and clear to match
- Clean the scratch with panel wipe on a cotton bud
- Leave the surrounding paint unsanded if the scratch is narrow
- Plan on several thin layers over a day, not one thick one
A scratch or chip to bare metal
Silver steel, or rust starting, at the bottom.
- Remove any rust with an abrasive pencil or fine paper until you see bright metal
- Clean with panel wipe and let it dry
- Apply an anti-rust or etch primer before any colour
- If rust has spread under the paint around the scratch, stop and get a body shop to look at it
A scuffed plastic bumper
Rubbed against a wall or a post.
- Wash off the transferred paint or rubber with a little tar remover on a cloth
- Sand away any raised fibres with fine wet-and-dry
- Use a plastic primer on any bare plastic
- Keep primer and colour well clear of parking sensors and cameras
A wider scuff that needs an aerosol
A patch bigger than a brush can cover cleanly.
- Pick a dry, still day, or a garage at room temperature
- Mask a generous area round the repair, with the tape edge rolled back so it does not leave a hard line
- Bring the aerosols indoors so they reach room temperature before use
- Test the colour on card before you spray the car
THE JOB
How to repair a car scratch
Set up and clean the area
20 minutesPark in the shade, out of wind, or in a ventilated garage. Wash the panel with car shampoo, rinse and dry it. Wipe the repair area with panel wipe on a clean cloth to remove wax and silicone. Put on gloves and glasses, and a respirator for any aerosol work. Then go to the section above and follow the list for your scratch.
- Work in good, even light; a torch at a low angle shows the scratch
- Keep children and pets away from aerosols and solvent
- Lay masking paper over nearby glass and wheels if you will spray
Mistake to avoid: Painting over wax. The paint crawls away from the wax in little craters called fish-eyes.
Do the fingernail test and mask up
10 minutesDraw a fingernail across the scratch and decide which repair it needs. Mask round the area with low-tack tape: tight to the scratch for a brush repair, a generous area for an aerosol. For an aerosol, roll the edge of the tape back on itself so it stands slightly off the paint; this softens the edge of the spray.
- Mark the ends of a fine scratch with tape outside the area so you can find them again
- Press tape down firmly on the edges you want sharp
- Cover nearby trim and badges
Mistake to avoid: Painting a scratch that would have polished out. The paint repair is always more visible than a polish.
Polish out a clear-coat scratch
30 minutesPut a little scratch remover on an applicator pad and work it into the scratch and a small area round it, with firm pressure at first. As it breaks down to an oily film, ease off to bring back the gloss, as the maker we read describes. Wipe off, check under a torch, and repeat two or three times. Stop when the scratch is gone or no longer improving.
- Work across the scratch and then along it
- Keep the area small; polishing a wide area thins more clear coat than needed
- Finish with a light polish and a coat of wax
Mistake to avoid: Polishing one spot for ten minutes. You can thin the clear coat through to the colour, which is a far bigger repair.
Treat bare metal and prime
40 minutesWhere metal is showing, clean out any rust with an abrasive pencil or fine paper until the metal is bright, wipe it with panel wipe and let it dry. Apply primer: for a chip, a tiny amount with a fine brush; for an aerosol repair, two or three light coats from the distance on the can, letting each flash off. Let it dry as its label says, then sand it smooth with very fine wet-and-dry used wet.
- Shake the aerosol for the full time on the can
- Keep primer inside the repair area, not over good paint
- Feather the edge of the primer with the finest paper so no ridge shows
Mistake to avoid: Painting colour straight onto bare metal. Without primer, the paint has nothing to bond to and rust creeps under it within months.
Build up touch-up colour in thin layers
2 hoursFor a chip or narrow scratch, shake the touch-up bottle well, wipe most of the paint off the brush, and lay a thin line of colour into the bottom of the scratch only, with a fine brush or a cocktail stick. Let it dry for the time on the bottle, then add another layer. Build up until the paint sits just level with the surrounding paint, not above it.
- Thin layers dry harder and flatter than one blob
- Keep the paint inside the scratch; any on the surrounding paint makes a halo
- Wipe a mistake off at once with panel wipe on a cotton bud
Mistake to avoid: Filling the scratch in one go. A thick blob stays soft for days, shrinks and leaves a dip, or sits proud as a visible lump.
Spray colour from an aerosol
1 hourWarm the can to room temperature and shake it well. Hold it at the distance on its label and start spraying beside the repair, moving across it in steady passes and releasing beyond the far edge. Lay a light mist coat first, then build two or three more thin coats over a slightly bigger area each time, letting each flash off. Stop as soon as the colour is even.
- Keep the can moving and parallel to the panel; stopping over the repair makes a run
- Spray on a still, dry day; damp air makes metallic paint cloudy
- Overlap each pass by about half
Mistake to avoid: Holding the can too close to get coverage quickly. The paint runs, and a run has to be sanded out and resprayed.
Apply clear lacquer
1 hourOnce the colour has flashed off as its can says, apply clear over the repair and a little beyond it. The data sheet for the clear we read asks for two coats at most, held 15-25cm off the panel, with a pause of 5 min - 10 min at 20°C before the second; it can be handled after 30 min. For a brush repair, apply clear from a brush bottle in one thin layer over the dried colour.
- Apply clear wetter than colour, but still in thin, even passes
- Feather the clear at the edges into the old paint
- Peel the masking tape away while the last coat is still slightly soft
Mistake to avoid: Putting clear on before the colour has flashed off. Solvent trapped under the clear wrinkles or clouds the finish.
Let it cure
1 dayLeave the repair to dry undisturbed at room temperature and out of the rain. The clear we read is air dry after 1 hr in a room at 20°C if the film is thin, but leave an aerosol or touch-up repair a full day, and longer in cold weather, before any sanding or polishing.
- Keep the car out of the rain and the dust
- Do not wash the car for a week
- Do not wax the repair for a few weeks while the paint hardens
Mistake to avoid: Polishing too soon. Soft paint smears and pulls, and you start again.
Level and polish the repair
40 minutesIf the repair stands slightly proud, wrap the finest wet-and-dry around a small soft block, wet it, and sand only the raised area lightly, checking often. Wipe and dry, then polish the area with a fine compound by hand to bring back the gloss, and finish with a light polish over the whole panel to blend it.
- Use plenty of water and very light pressure
- Stop as soon as the repair is level
- Wipe and check under a torch between passes
Mistake to avoid: Sanding through the new clear. Sanding should take off the bump only, never the edges of the old paint.
Protect and check in daylight
15 minutesAfter a few weeks, wax or seal the panel to protect the repair. Check it in daylight from a metre or two away. A small repair that blends from a step back is a good result; very few home repairs vanish under a torch.
- Clean nozzles by holding the can upside down and spraying briefly
- Label the leftover paint with the car's registration
- Keep touch-up paint for future chips
Mistake to avoid: Chasing perfection with more sanding and more coats. Each round adds risk; stop when it looks right from normal distance.
The mistakes that show
- Painting a scratch that would have polished out
- Blobbing touch-up paint on thickly instead of in thin layers
- Painting colour onto bare metal without primer
- Holding the aerosol too close and making runs
- A hard line where the masking tape was laid flat
- Using a two-pack clear at home without the protection it needs
Stop here and get a car scratch repair specialist
- The scratch is long, crosses a body line or more than one panel
- The panel is dented, creased or rusting under the paint
- The damage is around parking sensors, cameras or radar units
- The finish is a large area of metallic, pearl or three-coat paint that has to match exactly
| WHAT YOU SEE | WHY, AND THE FIX |
|---|---|
| The repair looks like a raised blob | Too much touch-up paint at once. Let it harden fully, then level it with the finest wet-and-dry on a small block and polish. |
| Little craters in the new paint | Wax or silicone on the surface. Let it dry, sand the area smooth, clean thoroughly with panel wipe and recoat. |
| A run in the colour or clear | The can was too close or held still. Let it dry hard, sand the run flat with fine wet-and-dry and recoat lightly. |
| The new colour is lighter or darker than the car | Wrong code, or paint not mixed well, or the panel has faded. Check the code, shake the can longer, and blend over a wider area so the eye does not see an edge. |
| A hard line where the masking tape was | The tape was flat to the paint. Polish the edge with fine compound; next time roll the tape edge back so it lifts slightly off the panel. |
| The clear went cloudy or milky | Damp air, or cold paint. Let it dry fully, then polish lightly; if it stays cloudy, sand and recoat on a warm, dry day. |
| The paint wrinkled | Clear applied over colour that had not flashed off, or a mix of incompatible products. Let it harden, sand back and recoat with products from one range. |
| The scratch came back after washing | A tinted scratch filler washed out. The scratch was through the clear coat and needs touch-up paint. |
WHAT YOU SAVE
What it costs to do it yourself
| Scratch remover, for a clear-coat scuff | €11.15–€16.79 |
|---|---|
| Touch-up brush bottle | €6 |
| Primer aerosol | €14.39–€16.20 |
| Colour aerosol | €13 |
| Clear lacquer aerosol | €13.20–€27.59 |
| Tack cloths | €7.20 |
| Total | €11–€81 |
| DIY total | €11–€81 |
Guide prices compiled by the Locufy team from published Irish and UK provider price lists and 2026/27 cost guides. Updated 2026.
Prices from an Irish motor retailer's paint and body repair ranges for October 2026. A clear-coat scuff needs only the first line; an aerosol repair needs primer, colour, clear and abrasives. The professional repair price, from the price guide, is shown alongside.
RATHER NOT?
Scratch repair technicians near you, with prices shown
The ones who cover your area, nearest first, with one score from every review. No account needed to look.
Or post the job free and let them come to you.
Keep the repair out of the rain for a day, do not wash the car for a week and do not wax it for a few weeks.
Aerosols are hazardous waste and must not go in the household recycling bin; take empty and part-used cans to a civic amenity site, which the mywaste.ie locator lists. Solvent-based paint and thinners go there too, as hazardous waste. Let leftover touch-up paint harden in its bottle with the lid off before it goes in the general waste.
Clear aerosol nozzles by spraying upside down for a moment. Store usable cans and bottles upright, labelled with the paint code, away from frost and heat.
Look at the repair after a month. A bubble or a brown edge means rust under the paint, which needs treating before it spreads.
Repairing a car scratch: questions people ask
Yes, if it is small and on a flat panel. A scratch that does not catch your fingernail usually polishes out; one that catches needs touch-up paint in thin layers and clear lacquer; bare metal needs primer first.
On a label usually in a front door shut, under the bonnet or in the boot. Buy paint by the code, not the colour name.
It is a mild abrasive and can dull a tiny scuff, but it is not made for paint and leaves the area hazy. A proper scratch remover does the same job better.
On most modern cars, yes. The colour coat has no gloss of its own, and without clear it looks flat and weathers quickly.
Wait a week before washing and a few weeks before waxing, so the paint can harden fully.
The Locufy price guide for Ireland puts car scratch repair at €80–€500 per repair, with €200 typical, depending on the size, depth and colour.
MORE GUIDES
More DIY guides
Sources — checked October 2026
- Autoglym — Advanced Paint Restorer: hand puck or dual-action pad; more pressure on marks, less as it breaks down to an oily residue; clean, dry surface
- U-POL — CLEAR #1 aerosol technical data sheet: sand old paint P800–P1000; 1–2 coats at 15–25 cm; 5–10 min flash-off at 20°C; handleable 30 min; air dry 1 hr; 1.6 m² theoretical per can; store 2 hours at room temperature
- HSA — Motor Vehicle Repair: Hazardous Chemicals (read labels and safety data sheets; protect skin and eyes; never clean hands with solvents)
- HSA — Isocyanates information sheet (two-pack spray paints and lacquers; respiratory sensitisation and occupational asthma)
- MyWaste — aerosols: hazardous waste, to the civic amenity site, not the recycling bin
- MyWaste — paint: harden small amounts; solvent-based paint and thinners as hazardous waste at a civic amenity site
- Halfords Ireland — scratch repair and paint restorers price check, October 2026: scratch removers €11.15–€16.79, touch-up brush €6.00, one-pack clear aerosol €27.59
- Halfords Ireland — car spray paints price check, October 2026: colour aerosol €13.00, clear lacquer €13.20
- Halfords Ireland — primer price check, October 2026: €14.39–€16.20
- Halfords Ireland — fillers and preparation price check, October 2026: tack cloths €7.20