Car Bodywork Repairs: Types, Costs and How to Choose

Every bodywork repair comes down to two questions: has the paint been broken, and has the metal moved. If the paint is intact and the panel has been pushed rather than creased, the repair keeps the original finish and is quick. If the paint is broken, or the panel has been stretched, torn or corroded, it becomes a refinishing job, and the cost and time rise with the area involved. Everything below follows from those two questions.

What counts as a car bodywork repair?

Car bodywork repair is any work that restores the exterior structure and finish of a vehicle, covering dent removal, scratch and scuff refinishing, bumper repair, panel replacement, corrosion treatment and paintwork correction. It sits between mechanical repair, which keeps the car working, and detailing, which cleans and protects what is already there.

Bodywork matters for three reasons beyond appearance. Panels are part of how a modern car manages a crash, so damage that has folded or torn structure affects how it behaves in the next impact. Paint is a corrosion barrier, so a broken paint film on a steel panel is the start of rust rather than a cosmetic issue. And bodywork condition drives a very large part of what a car is worth when it is sold, part exchanged or handed back at the end of a lease.

What causes bodywork damage on UK roads?

Most damage happens at low speed and close to home rather than in collisions.

• Car parks. Door dings, trolley strikes and scraped bumper corners in tight bays account for a large share of cosmetic damage on any car that lives in a town.
• Kerbs and narrow lanes. Sill scrapes, kerbed alloys and mirror damage are routine on older residential streets and rural single track roads with hedgerows.
• Stone chips. Loose chippings behind lorries and on freshly dressed roads pepper the bonnet, bumper and windscreen surround, particularly at motorway speeds.
• Winter salt. Salted roads accelerate corrosion wherever the paint is already broken, and salt collects in wheel arches, sills and door bottoms where it stays damp for months.
• Weather. Hail, storm debris and falling branches all cause the shallow, spread out damage that suits paintless techniques.
• Age. Lacquer peel on horizontal panels, faded plastic trim and corrosion around arches and tailgates all appear on older cars regardless of how carefully they are driven.

What are the main types of car bodywork repair?

Different damage needs a fundamentally different process, and the choice is made on the damage rather than on the vehicle.

Paintless dent removal

Paintless dent removal (PDR) reshapes a dent from behind the panel using rods and picks, with no filler and no paint. The technician reads the panel through a reflected line board and lifts the low point in small increments, tapping down the raised ring around the dent as they go. Because nothing is sprayed, the original factory paint is preserved, which is the finish that holds up best over time.

PDR is the right choice for door dings, hail dents and shallow impacts where the paint has survived. It is not an option where the paint has cracked, where the metal is sharply creased or heavily stretched, or where the back of the panel cannot be reached safely.

SMART repair

SMART repair stands for small to medium area repair technology. Instead of refinishing an entire panel, the technician prepares the damaged section, primes and paints it, then blends the new paint outwards into the surrounding area so there is no visible edge. Less material, less masking and no full oven cycle mean the work is faster and cheaper than a traditional repair, and it can often be carried out at your home or workplace.

It suits scuffs, scratches, stone chips, small dents and kerbed alloy edges, in other words the majority of the damage a car picks up in normal use. Our mobile SMART repair service exists for exactly this category of work.

Scratch and paint damage repair

Scratches are treated according to depth. Marks confined to the clear coat are machine polished out. Scratches through to the basecoat or primer are flatted back, primed if needed, resprayed in the matched colour and lacquered. Deep or long scratches that cross body lines usually need the whole panel refinished, because a blend has nowhere to hide on a sharp edge.

The skill in this work is the colour match. Paint is mixed against the manufacturer's code and the variant used on that build, sprayed onto a test card, then compared to the cleaned panel in daylight before anything is applied to the car.

Bumper repair

Bumpers are plastic, not steel, and behave differently. They flex, they can be heat reshaped, and cracks can be plastic welded from behind and refinished on the face. Scuffed corners are the single most common bumper repair, and they are usually a straightforward localised job.

Modern bumpers complicate the work in one respect. Parking sensors, cameras, radar units for adaptive cruise control and washer jets are all mounted in or behind them, and they have to be removed, refitted and in some cases recalibrated. A bumper repair on a car with driver assistance systems is a more involved job than the same repair on a car without.

Panel replacement

Where a panel is torn, folded or corroded beyond repair, it is removed and replaced. Bolt on panels such as wings, doors, bonnets and boot lids are the most straightforward. Welded panels such as quarter panels are a much larger job. The new panel arrives in primer and has to be prepared, painted to match and blended into the panels either side.

Panel replacement is the most expensive type of bodywork repair, so it is a last resort rather than a default. A good shop will only recommend it when repairing the existing panel would cost more or produce a worse result.

Rust and corrosion repair

Corrosion is repaired by cutting or grinding back to sound metal, treating the surrounding area, then priming, filling as needed, painting and sealing. Painting over rust does not stop it, it just hides it for a season.

The important judgement is location. Surface corrosion on a wing or a bonnet is a cosmetic repair. Corrosion in a structural area, such as a sill, a subframe mounting or a suspension mounting point, is a safety and MOT matter, and it needs proper metal replacement rather than filler.

Paint correction and machine polishing

Not every finish problem is damage. Swirl marks from brush car washes, light oxidation on older paint and hazing after a poor previous repair are all corrected by machine polishing rather than by spraying. A staged process using a cutting compound followed by a finishing polish removes a very small amount of clear coat and restores gloss across the whole car. It is the cheapest way to transform how an otherwise sound car looks, and it is worth doing before deciding a panel needs paint.

Should you repair bodywork yourself or use a body shop?

DIY makes sense at the shallow end and stops making sense quickly.

The honest dividing line is this. Home repair is well suited to clear coat scuffs, stone chips on solid colours, shallow suction pulled dents, and protecting paint so damage does not get worse. It is poorly suited to anything involving metallic paint over a visible area, panel edges and body lines, corrosion, or a car that will face a lease handback inspection where a poor repair is charged as damage.

What can you realistically do at home?

• Wash and decontaminate properly. Two buckets with a grit guard, a clay bar a couple of times a year, and drying with clean microfibre rather than an old towel.
• Polish out light marks. A mild compound and a foam applicator will remove most clear coat scuffs and wash marks.
• Touch in stone chips. Degrease, apply thin coats of colour matched paint, let it cure hard, then flat the high spot and polish it level.
• Seal broken paint quickly. Even a temporary dab of touch in paint over exposed metal buys time before corrosion starts.
• Pull a shallow dent. A suction puller or a glue tab kit on a smooth, uncreased dent with unbroken paint.
• Protect the finish. Wax or sealant a few times a year, and paint protection film on bumper corners, sills and the leading edge of the bonnet if you cover motorway miles.

What to leave alone: welding, structural corrosion, anything requiring a panel to come off, any repair on aluminium panels, and any spraying you cannot mask, extract and cure properly.

What does a professional body shop actually do differently?

The visible part of a repair is spraying, but the quality comes from everything either side of it.

• Assessment. Deciding whether damage needs PDR, a localised repair, a full panel or a replacement, and spotting secondary damage such as a cracked bracket behind a bumper.
• Preparation. Stripping back to a sound edge, feathering the transition between layers, and getting the surface flat. Almost every visible fault in a poor repair started here.
• Colour matching. Mixing to the code and variant, spraying a test card, checking it in daylight against the cleaned panel and adjusting before touching the car.
• Controlled spraying. A booth or a clean, contained environment, correct gun setup, and the right number of coats with proper flash off between them.
• Curing. Forced curing at controlled temperature so the paint hardens properly rather than staying soft for weeks.
• Blending and finishing. Melting the new paint into the surrounding area, then flatting and polishing so the repair has the same texture and gloss as the factory finish.
• Reassembly and calibration. Refitting trim, handles, lights and sensors correctly, and recalibrating driver assistance systems where required.

How do you choose a car body repair shop?

Judge a repairer on evidence rather than on the lowest quote.

• Look at their own work. Ask to see recent repairs, ideally on a paint type similar to yours. Metallic and pearl finishes are where standards show.
• Check the guarantee. A reputable shop guarantees parts and workmanship, and will tell you exactly what that covers and for how long.
• Ask what method they propose and why. If a shop wants to spray a panel that could be repaired with PDR, or wants to replace something that could be repaired, ask them to justify it.
• Look at the premises. Order, cleanliness and well maintained equipment tell you a lot. Dust in a paint environment is the enemy of a good finish.
• Confirm insurance. Public liability and, if they employ staff, employers' liability insurance. It protects both sides if something goes wrong while your car is with them.
• Get a written, itemised quote. Labour, materials, parts and VAT set out separately, so you can compare like with like and there are no surprises.
• Compare more than one quote, but not on price alone. The cheapest quote is often the one that skips preparation.
• Ask about mobile options. For cosmetic damage, a mobile repair at your home or workplace can save a week of being without the car.
• Judge the communication. A shop that answers questions clearly before you commit will usually keep you informed while your car is in.

What affects the cost of car bodywork repairs?

Bodywork is priced on labour hours, materials and parts, so the drivers of cost are the things that add hours.

As a rough ranking from cheapest to most expensive: machine polishing, paintless dent removal, localised SMART repair, single panel respray, multiple panel repair, panel replacement, full respray. Anything you can keep at the lower end of that list saves money, which is why early repair is usually cheaper than waiting.

Always get a proper assessment rather than a guess from a photo alone for anything more than a scuff. Damage that looks superficial can hide a cracked bracket, a distorted mounting or corrosion under the edge of the paint, and finding that out mid repair is how quotes change.

Should you claim on insurance or pay directly?

For most cosmetic damage, paying directly works out cheaper. A typical scuff, chip or small dent repair costs less than many policy excesses, and a claim also costs you your no claims discount, which pushes premiums up for several years. Add those together and a small claim can cost more over time than the repair.

Insurance makes more sense when the damage is extensive, when several panels are involved, when another vehicle was hit, or when the repair runs well beyond your excess. If you do claim:

• Check your excess, including any compulsory excess on top of the voluntary amount.
• Ask whether your no claims discount is protected, and what a claim does to your premium at renewal.
• Confirm whether you can use your own repairer and what changes if you do.
• Ask whether a courtesy car is included and for how long.

If someone else caused the damage and liability is clear, the repair usually goes through their insurer rather than yours, and your no claims discount should not be affected once the claim is settled.

What counts as fair wear and tear on a lease car?

If the car is leased, on a PCP or part of a company fleet, the standard almost every UK finance company measures against is the BVRLA fair wear and tear guide. It accepts that a car used normally will pick up light marks, and it sets out size thresholds for what is acceptable on each area of the vehicle. Scratches and dents beyond those thresholds, corrosion, poor previous repairs and mismatched paint are all recharged at handback, and the recharge is calculated at main dealer rates rather than what a repair would have cost you.

That makes the economics simple. Have the car inspected a couple of months before it goes back, get the damage that exceeds the standard repaired, and you almost always pay less than the charge you would otherwise receive. Two points worth knowing: a bad DIY repair is treated as damage in its own right, and a mismatched respray can be charged even where the original damage would have been within tolerance.

How long do car bodywork repairs take?

Time scales follow the method rather than the appearance of the damage.

Parts supply is the most common cause of delay on larger jobs, particularly on newer models and imports. A shop that tells you it is waiting on a part is usually telling you the truth, but ask for an expected date rather than accepting an open ended timescale.

Can bodywork damage fail an MOT?

Yes, in specific circumstances. An MOT is not a general condition check, but the tester will fail a car for sharp edges on damaged bodywork that could injure someone, for body panels or trim that are insecure enough to be a danger, and for corrosion in prescribed structural areas such as within 30cm of a seatbelt mounting or a suspension mounting point.

Cosmetic damage such as a dented door, a scuffed bumper or faded paint is not an MOT matter. But a bumper hanging loose, a wheel arch with a jagged corroded edge, or a mirror missing its glass will all cause problems, and a sill that has rusted through is both an MOT failure and a structural repair. If in doubt, have corrosion around sills, arches and mounting points looked at before the test rather than after it.

How do you keep your car's bodywork in good condition?

• Wash regularly through winter, including the arches and underside, to get salt off before it sits and works on the paint.
• Wax or seal a few times a year. It gives contamination something to sit on other than the clear coat, and makes the next wash easier.
• Deal with chips early. A dab of touch in paint on a stone chip prevents the corrosion that turns it into a panel repair.
• Park with room. Away from trolley bays and aisle ends, reversing in where you can, and a hand's width off the kerb on the road.
• Fit protection where it earns its place. Door edge guards, mud flaps, boot lip protectors and paint protection film on high impact areas.
• Watch the storm damage risks. Avoid parking under trees in high winds and keep the car covered or under shelter if severe hail is forecast.
• Check the car over in daylight every few weeks. Bubbling paint around an arch or a tailgate handle is far cheaper to deal with at the bubble stage.
• Do not leave a poor repair in place. Filler that has been applied over rust, or paint applied over contamination, will fail and take good paint with it.

Signature has been carrying out vehicle body repairs since 2008 from the body shop at Unit C, The Yard, Rear of Constellation Mill, Radcliffe, Manchester M26 4AD, with a mobile service across Greater Manchester, Lancashire, Cheshire, Merseyside and West Yorkshire. Quotes are free and answered within 24 hours, and all work carries a guarantee on parts and workmanship.