How can you tell a car has been repainted from a photo?

Compare panels rather than judging one. A repainted panel returns light differently to the ones beside it: slightly flatter, a half shade off, sometimes with a texture visible in the reflection. The evidence is the discontinuity along a line of panels, never the appearance of a single panel on its own.

What do panel gaps tell you?

Whether a panel has been off the car. A factory gap is even along its whole length. A gap that opens or tapers from one end to the other means something was removed and refitted, and whatever moved it is worth understanding before you bid.

Can you spot filler in a photograph?

Not directly, but you can often see its consequence. Filler sanded and painted rarely holds a perfectly flat reflection, so a straight edge reflected in the panel, a door frame or a roof line, will bend where the surface is no longer true.

Which photograph is most useful for hidden damage?

A daylight three quarter view taken along the side of the car, because it puts several panels in one reflection at once. One such photograph does more work than a dozen head-on shots of individual panels.

Buying · 9 min read

Reading auction photos for hidden damage

Reflections, gaps and shadow: the three things a photograph records faithfully whatever the seller intended, and how to use them on a set that was composed to sell.

Published September 23, 2026

A photo set is composed by somebody who wants the car to sell. That does not make it dishonest, and it does mean the useful evidence is the part the seller could not control: how light behaves on the surface, and how panels line up with each other.

Reflections travel across panels, and repairs interrupt them

A painted panel is a mirror. Find a photograph taken along the side of the car in daylight and follow one reflected line, a building edge, a kerb, the horizon, from the front wing to the rear quarter.

On an original car that reflection is continuous. Where a panel has been refinished it changes: flatter, a half shade off, sometimes with a texture the factory finish does not have. You are not looking for damage. You are looking for the place the reflection stops agreeing with itself.

Filler shows the same way. A surface that has been built up and sanded rarely stays truly flat, so a straight reflected edge bends across it.

Gaps are the second opinion

Follow the seam between hood and wing from front to back, then the doors, then the trunk lid. A factory gap is even along its length. A gap that opens or tapers means the panel has been off the car and something moved when it went back.

Gaps are more reliable than paint in bad light, which is why they are the check to reach for when a set is photographed in a dark lot or under flat cloud. Light can hide a respray. It cannot close a tapering gap.

Shadow finds what the angle hides

A dent photographed head-on in flat light can disappear entirely. The same dent in raking light throws a shadow with a shape. So the most informative photographs in many sets are the accidental ones: a low sun, a shop light overhead, a car parked at an angle to the building.

When you find a photograph with strong directional light, spend longer on it than on the composed ones. It was not chosen to be revealing, which is exactly why it is.

The angle nobody took

Missing coverage is evidence in a composed set. Three wheels photographed closely and the fourth only from a distance, one rear three quarter and not the other, an engine bay shot from so far back that nothing is legible: none of these proves anything, and all of them tell you where to spend your remaining attention.

What a tool adds, and what it does not

Reading every photograph in a set this carefully is the part that does not scale. Two hundred lots in a morning is thousands of images, and the reason buyers skim is arithmetic rather than laziness.

That is what our extension is for: it reads the images on the page and marks what it finds on the photograph it found it in, so the reading above happens on twenty cars instead of three. It asks for access to each site separately, and it reads nothing until you ask it to. It is not an inspection, and photographs still cannot show frame damage, flood history or a tired engine. The extension page says what it does in the same words.

Common questions

How can you tell a car has been repainted from a photo?: Compare panels rather than judging one. A repainted panel returns light differently to the ones beside it: slightly flatter, a half shade off, sometimes with a texture visible in the reflection. The evidence is the discontinuity along a line of panels, never the appearance of a single panel on its own.
What do panel gaps tell you?: Whether a panel has been off the car. A factory gap is even along its whole length. A gap that opens or tapers from one end to the other means something was removed and refitted, and whatever moved it is worth understanding before you bid.
Can you spot filler in a photograph?: Not directly, but you can often see its consequence. Filler sanded and painted rarely holds a perfectly flat reflection, so a straight edge reflected in the panel, a door frame or a roof line, will bend where the surface is no longer true.
Which photograph is most useful for hidden damage?: A daylight three quarter view taken along the side of the car, because it puts several panels in one reflection at once. One such photograph does more work than a dozen head-on shots of individual panels.