How to spot repair, repainting and honest wear on an old object

Honest wear vs intervention

Wear has a geography. It gathers where hands, light and friction do their work: the corners of a canvas, the arms of a chair, the rim of a bowl, the edge of a poster that hung for years. It tends to be gradual, uneven in the right places, and consistent with how the object was actually used.

Intervention has a different signature: it arrives later, so it sits on top of the wear or replaces it. A repainted patch laid over a crack, a new screw in an old hole, a gloss island inside a matte field — the clue is usually a surface that stops behaving like its neighbours.

So the working question is never ‘is it damaged?’ — old things are allowed to be damaged. It is ‘which layer of this surface came first?’

Craquelure and what it records

Aged paint and varnish develop networks of fine cracks — craquelure — as the layers expand, contract and move over decades. The pattern is produced by the materials and the history together: dense and even on some surfaces, wide and directional on others, sometimes barely present at all.

Its diagnostic value is sequence. Cracks form in the original layers over time; paint applied later — retouching or overpaint — either bridges the crack network or shows a different pattern, often none at all. A passage that should be old but sits unnervingly smooth, or a crack pattern that stops dead at a straight edge, earns a second look.

None of this is conclusive from a photograph: imitations of craquelure exist, and plenty of genuinely old surfaces crack very little. Crack pattern is a clue that changes the weight of other clues — supporting evidence, never a verdict by itself.

Overpaint, relining and retouching

Retouching confines new paint to a loss or damage — the National Gallery's glossary notes retouching is usually intended to be invisible to the naked eye, so a well-matched repair may not announce itself in ordinary light. Overpaint is broader repainting across original surface; look for passages where colour, texture or crack pattern break sharply against their surroundings.

Relining is a support repair: a second canvas adhered to the back of a weakened original, a common historical treatment for old canvases. It shows at the back — a doubled edge, a suspiciously regular surface — and can flatten the texture on the front.

Each can leave a clue in a photograph — retouching as an island of different texture or gloss, overpaint as a tonal block, relining as evidence on the reverse — but these are possibilities, not reliable tells: well-matched retouching is meant to be invisible to the naked eye, and identifying treatment can take a conservator's examination or technical imaging such as ultraviolet or X-radiography. A clear photograph is where a condition question starts, not where it ends. And the back of a painting is often more informative than the front — the print-or-painting guide treats the back as evidence for the same reason.

Replaced parts on objects and furniture

On furniture and objects, intervention usually means replacement rather than repainting: a new foot or moulding whose wood is brighter and less worn than its neighbours, fresh hardware seated in old holes, upholstery tacks over older tack lines, a veneer whose grain changes direction mid-panel.

On ceramics and glass, look for the repair rather than the part: a visible glue line, a filled chip whose sheen differs from the glaze, a rim section that sits or rings differently. None of this is deception in itself — repairs keep objects usable and alive — the question is whether the work was declared.

Age-mark the parts, not just the object: screws, joints, staples, glazing points, cords. Components made in different decades are how you tell a repaired antique from an untouched one — or, just as legitimately, a well-maintained one.

What a photo can and can't show

A camera is a documenting instrument, not a penetrating one. Even, frontal light records the surface state; raking light — a lamp or torch skimmed low across the surface — exaggerates every texture break, which is why it is the first lighting method in condition photography. The Canadian Conservation Institute's published guidance on photographing museum objects covers the lighting approach in detail.

Here is the five-pass version, short enough to run anywhere:

1. 01

   Flat light first. Photograph the whole surface in even, frontal light. This is the base state — the honest ‘before’ that every other photograph is compared against.

2. 02

   Raking light second. Skim a light across the surface at a low angle. Fills, patches and repainted areas often sit differently — slightly proud, slightly flat, a different gloss — and low light makes the difference readable.

3. 03

   Edges, joins and the back. Turn the object. Relined canvases show at the back; replaced parts show at joins and undersides; later work often hides where frame meets object.

4. 04

   Compare like with like. A suspect patch should differ from its neighbours in more than one way — colour and texture and crack pattern — before it counts as a clue worth reporting.

5. 05

   Name what would settle it. UV examination, X-radiography, a conservator's condition report: write down the evidence you cannot produce yourself. A photograph documents the surface; it cannot see beneath varnish or earlier paint.

When condition questions need a conservator

Before buying, selling, insuring or donating, condition belongs to professionals: a conservator's examination and condition report, an appraiser's valuation. In the US, the American Institute for Conservation maintains a Find a Professional directory; in the UK, the Institute of Conservation — Icon — keeps a Find a Conservator route. Both are linked in the sources.

And the standing rule, worth repeating in every condition context: no DIY cleaning or repair. No solvents, no tape removal, no amateur reframing — a well-meant wipe can remove original surface permanently. The found-painting guide makes the same rule for the same reason. Document what you see; leave the doing to a conservator.

Used this way, condition looking changes the conversation you arrive with: photographs, observations and named questions are exactly what a professional can work from — and exactly what an AI-generated reading can help you assemble, as a provisional starting point rather than a verdict.