Something has been put on the window overnight and it has not come away. What is left is a pale, clouded shape, rather as though one part of the glass had been deliberately frosted. Cleaning does nothing at all. If anyone has since gone at it with a blade, the pane is now in a worse state than when it was found.
The damage is acid etched graffiti. A corrosive gel was spread across the surface and left there, and it has eaten into the glass. Nothing sits on top of the pane awaiting removal, which is the reason no product or method tried so far has had the slightest effect.
It is recoverable in almost every instance. We restore the glass where it is, normally inside a single working day, discreetly and at a small proportion of what any replacement would involve.
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In Mayfair The Panes Are Too Small And Too Old To Replace
Mayfair trades from houses. That single fact governs everything about how damaged glass here should be dealt with, and it is the opposite of the problem the big retail streets have.
Away from the principal shopping frontages, the commercial occupiers of this district sit in converted Georgian and early Victorian townhouses. Galleries on Cork Street and Dover Street, family offices and investment houses around Berkeley Square and Charles Street, clinics and consulting rooms on Harley Street's Mayfair equivalents, embassies and institutional premises across Grosvenor Square and the surrounding streets. The glazing is domestic in origin: timber sash windows, glazing bars, divided lights, small individual panes set into a frame that was made by a joiner rather than assembled by a glazier.
When acid gel is applied to a window like that, replacement stops being a glazing job.
You cannot simply swap one small pane. A single light within a divided sash is set in putty into a rebate cut for it. Taking it out and fitting a new one is joinery, on a window that is very often part of a listed building, and it means either a specialist working on the sash in situ or the whole sash coming out and going to a workshop.
New glass will not match the old. Historic glass carries slight distortions and a character modern float glass does not have. Put one flat, perfectly even pane into a sash of six and the difference is obvious from the pavement, in a district where that kind of detail is noticed and where conservation officers take an interest.
The sash itself is usually the protected element. Where a building is listed, the protection commonly covers the joinery, the glazing bars and the opening, not merely the elevation. Altering any of that can require consent, and proceeding without it is an offence rather than an administrative slip.
Restoration bypasses the whole problem. The pane never leaves the rebate, the putty is undisturbed, the sash stays in the frame and the frame stays in the wall. We work each affected light individually, which on a divided window is slower than treating a single large sheet but is the only route that leaves the window as it was.
Recent Acid Etched Graffiti Removal Projects
When The Window Is The Display Case
The gallery frontages along Cork Street, Dover Street and Albemarle Street present a second problem that is specific to this district.
For a gallery the glass is not a shopfront, it is the vitrine. Work is hung to be seen through it from the street, frequently lit, and optical clarity is not a presentation nicety but the entire function of the window. A faint haze that would be tolerable on a bank frontage is not tolerable on a window with a canvas behind it.
Many of these premises already carry applied film, whether for ultraviolet protection of the works, for security, or both. That matters to us before we start. Film on the inner face is protected and left alone. Film on the outer face has to be assessed, because etching that sits on top of it is a different job from etching that has reached the glass beneath, and the two are not always distinguishable without looking properly.
Where a gallery is between hangs, that is the moment to deal with the glass, and we would rather schedule around an exhibition calendar than work in front of one.
Where We Get Called Out Around Mayfair
Mount Street and South Audley Street. Ground floor retail and restaurants in fine period stock, with traditional shopfronts, divided glazing and the highest presentation standards of any street in the district.
Cork Street, Dover Street and Albemarle Street. The gallery run, with the display glazing described above and frontages that stay lit long after closing.
Berkeley Square and Charles Street. Office and institutional premises in converted houses, brass plaque rather than signage, domestic scale sash windows at street level.
Curzon Street and Half Moon Street. Mixed commercial and residential, hotels and clubs, with entrance glazing and fanlights that take damage more often than the main windows.
Shepherd Market and the lanes around it. Small bars, restaurants and shops in tightly packed older buildings on narrow streets, quieter at night and considerably less overlooked.
Grosvenor Square and the surrounding streets. Institutional and diplomatic premises with security arrangements that have to be addressed before anybody attends.
The mews. Hays Mews, Adams Row and the others, where offices and studios occupy converted stabling with glazing at a scale nobody would call commercial.
Discretion, And The Estate
Two practical constraints that sit over everything in this district.
The first is visibility. Nothing about our attendance should be apparent to anybody arriving at your building. No branded vehicle sitting outside a gallery or a club during opening. No equipment across an entrance. We attend early, late, or at whatever hour your office manager or house manager specifies, and there is nothing to see by the time anybody arrives.
The second is that much of Mayfair sits under long established estate ownership, and where that applies there are usually standards governing what may be done to a frontage and a process for approving it. We ask who holds the estate interest, provide the documentation required, and deal with the estate surveyor or managing agent directly rather than leaving a tenant to relay messages.
Replacing It Versus Restoring It
| Replacing the glass | Restoring the glass | |
|---|---|---|
| Divided light sash windows | Joinery work, putty, possibly the sash removed | Each light treated in place, frame untouched |
| Matching historic glass | New flat glass beside older glass, visibly different | The original glass is retained |
| Listed joinery and glazing bars | Consent may be required | Nothing altered, no application arises |
| Applied gallery film | Film has to be stripped and refitted | Assessed, protected, or replaced as required |
| Timescale | Weeks once joinery and glass are arranged | Usually a single visit |
| Visibility of the works | An open frontage, visible for days | Discreet, outside opening hours |
| Cost | Glazing, joinery, decoration and making good | Up to 90 per cent less |
The cost comparison is set out at glass replacement vs protection: the true cost, and the choice between the two at should I replace or restore etched graffiti glass.
Do you need graffiti removed from your property? Get a fast, hassle-free quote today! Click here to get a professional graffiti removal quote or call us today on: 020 8050 5997
Which Of The Three Is On Your Window
Three sorts of damage present similarly from a few feet away, and each demands a different response.
Paint or marker lies above the glass. Dense colour, a crisp boundary, and a fingernail meets a step where it begins. The appropriate solvent takes it off without touching the pane.
Acid etching lies within the glass. Washed out and cloudy while remaining see through, with a barely perceptible roughness occupying exactly the plane of the surrounding surface. The boundary tends to trail off where the gel migrated before somebody attended to it. Behind an illuminated interior it declares itself far more insistently than it does from the street.
Scratching has been incised. Narrow, brilliant, ruled lines produced by a blade, a stone or a key, into which a fingernail descends.
Photographs to check yours against are at glass scratching vs acid etching, with the clouded appearance addressed at white frosty window graffiti. On why it happens at all, see why acid etching graffiti happens.
What Should Happen First
Any residue remaining on the pane is an active chemical. Etching gel injures skin and eyes. Nobody should handle it, and on a house frontage that means telling the cleaning contractor before they arrive rather than afterwards.
Nothing may be scraped or scoured. A blade introduces permanent scoring into glass that was otherwise going to recover cleanly, and a cloth drawn across wet gel transfers the damage onto lights that were entirely unaffected. On a divided sash that is how one pane becomes four.
Proprietary removers achieve nothing. There is no film of paint for them to dissolve, and applying an unknown product over historic glass or applied film compounds the situation.
Where residue is visible and it is safe, run cold water over it in quantity, with gloves and eye protection, allowing it to carry away rather than wiping.
Have it photographed at once, dated, from the pavement and from within, with each affected light recorded separately if the window is divided. That record supports the report, the claim and our pricing.
Notify the police. This constitutes criminal damage and the reference will be required before an insurer takes the matter further. The sequence is described at what to do when your shop window is vandalised.
How The Work Is Carried Out
Establishing what the glass is. Historic or modern, float, toughened, laminated, coated, mirrored or a sealed unit, whether any film is present and on which face, and how far the acid has penetrated. On a divided window each light is assessed on its own, because they are frequently not all of the same age.
A trial on the least conspicuous light. We prove the approach somewhere it cannot be seen from the room or the street before proceeding across the window.
Protecting the joinery. Glazing bars, putty lines, beads, paintwork and any applied film are masked before a tool touches the glass. On a listed sash the joinery is the element that cannot be replaced, and it is treated accordingly. Slurry is contained and kept off the cill, the stonework and the paint.
Abrading through the grades. Each stage is finer than the last, taking away a depth of glass no eye could measure, and the treated area is carried right out to the glazing bar or well past the mark so that nothing betrays where it finishes. Attend only to the lettering and what remains is a dished patch, a shallow lens ground into the middle of the light, bending whatever lies beyond it. In a small pane that distortion is proportionally far more visible than it would ever be in a shop window.
Cerium oxide for the finish. Remaining haze is taken back under wet cerium oxide, appraised from the side where daylight travels through the pane rather than bounces from it.
Judged from within the room. A house window is looked through from inside far more than it is looked at from outside, so the finish is assessed from the room, against the light, before we regard it as complete.
A single light is usually finished well inside three hours, and a divided sash is worked light by light. The removal process is described at acid etched graffiti techniques and removal methods and the polishing at how to polish shopfront glass to optical clarity, with the products at how to use cerium oxide glass polish.
Where restoration will not work we say so at the outset. Acid that has travelled unusually far into the glass, a sealed unit that had already failed, or a coating lying precisely in the path of the work each mean the light genuinely needs replacing, and that opinion is given in writing before any expenditure is agreed.
Work We Have Completed Nearby
- Acid etched graffiti removal on Bond Street
- Graffiti and acid etched graffiti removal in Soho
- Acid etched glass graffiti removal in Victoria
- Acid etched graffiti removal in Richmond
Surfaces We Deal With In Mayfair
- Float and historic window glass in timber sashes, divided lights and fanlights.
- Laminated shopfront and gallery glazing on the principal retail frontages.
- Toughened glass in entrance doors, porches, screens and internal balustrades.
- Sealed units within later windows, addressed from the outer face so the cavity remains closed.
- Mirrors and mirrored panels in club rooms, restaurants and private lobbies.
- Obscured, etched and decorative glass, where an existing pattern must be reproduced rather than taken off.
- Glass block in basement lightwells and rear elevations.
- Steps, cills and facings in polished granite and polished marble.
- Polished metal on plaques, letter plates, door furniture, railings and bootscrapers.
Anything with a worked or polished surface suffers from the same gel. On a townhouse frontage the brass plaque, the letter plate and the stone step are marked as often as the window, and everything gets attended to on the one visit.
The Occupiers We Act For
Galleries and art dealers. Display glazing returned to full clarity, scheduled between hangs wherever possible.
Family offices, investment houses and professional firms. Discreet townhouse frontages restored before anybody arrives for the day.
Private members' clubs and hotels. Attendance at the hour that avoids members and guests altogether.
Estate surveyors and managing agents. Listed and period portfolios, with the documentation required for estate approval and recharge.
Institutional and diplomatic premises. Security arrangements agreed in advance of any attendance.
Where The Liability Sits
On a converted house in multiple occupation the answer is seldom obvious, and it is worth establishing before an invoice is accepted. A ground floor tenant's own window will usually fall within the demise. The front door, the fanlight above it, the stair windows serving the upper floors and anything forming part of the elevation generally belong to the landlord and are recovered through the service charge. On an estate held building the estate interest may sit above both. Read the demise plan rather than relying on the wording alone.
Regarding insurance, weigh our figure against the excess before anything is reported to a broker. A single light restored will commonly fall below it, and a claim producing nothing still appears at renewal. A whole sash, or a frontage, alters that judgement. The dated photographs of each light and the written description of works are provided in every case.
Reducing The Chance Of A Repeat
Bringing the glass back deals with what has happened. It does nothing to discourage anyone, and quiet Mayfair side streets and mews are attractive precisely because they are unobserved after dark.
A sacrificial film bonded to the outer face is intended to be ruined in place of the glass. It lifts off and is renewed quickly, at a small fraction of restoring the pane again. On historic and divided glazing there is an additional consideration: the film is cut to each light rather than applied as a sheet, and on a listed window the specification and the method of fixing should be agreed with whoever oversees the building before it goes on.
The subject is covered fully on the anti-acid etched graffiti protection page, including the principle it works on, how long it remains serviceable, what fitting involves financially and its effect on the appearance of the glass. Display frontages are addressed at protecting retail displays from glass vandalism.
Districts Adjoining Mayfair
- Bond Street
- Marylebone
- Soho
- St James's
- Knightsbridge
- Belgravia
- Fitzrovia
- Covent Garden
- Westminster
- Paddington
The service is described in full, with our process video and the complete question set, on the main acid etched graffiti removal page.
Mayfair Acid Etched Graffiti Removal: Frequently Asked Questions
One light in a sash window has been etched. Can it be treated without taking the window apart?
Yes, and that is precisely why restoration suits this kind of glazing. The pane stays in its rebate, the putty is not disturbed and the sash never leaves the frame. We work the affected light in place and carry the treatment out to the glazing bar so the finish has no visible boundary.
Could we not simply have the one small pane replaced?
You could, but it is joinery rather than glazing, it may need consent on a listed building, and the replacement will not match. New float glass sits perfectly flat and even beside older glass that does not, and in a divided sash that contrast is obvious from the pavement.
We are a gallery and the window is effectively a vitrine. Will the clarity be good enough?
That is the standard we work to. Final clarity is judged by looking through the glass towards the light rather than at reflections off it, and on gallery frontages we assess from inside the space with the lighting on, which is how the work will actually be viewed.
There is film on our glass already. Does that complicate matters?
It needs establishing first, which is part of the assessment. Film on the inner face is protected and left undisturbed. Film on the outer face has to be examined, since damage sitting on the film is a different proposition from damage that has reached the glass beneath it.
Will anyone see you working?
No. There is no liveried vehicle at the door during opening hours, no equipment across an entrance and no activity in view of anyone arriving. We attend at whatever hour suits the building and there is nothing to notice afterwards.
The building is listed. Does that rule restoration in or out?
Strongly in. Consent can be required to alter a listed building, and here the joinery, the glazing bars and the opening are frequently protected as much as the elevation. Restoration changes none of it, so no application arises.
Our premises has particular security requirements. Can you accommodate that?
Yes. Vetting, advance notification, escorted access and defined working hours are all normal for us. Tell us the requirements and we will meet them before attending rather than negotiating at the door.
The brass plaque and the stone step were marked as well.
Both are recoverable and both get dealt with in the same visit. The gel attacks any worked surface, so plaques, letter plates, railings, cills and steps are affected alongside the glass.
Several lights across one window are damaged. How is that handled?
Each is treated individually and priced individually, with the attendance cost shared across the window rather than repeated. Where a whole sash is affected we work through it light by light in a single visit.
Will there be any distortion afterwards?
Not where the work is taken out to the glazing bar or well past the mark. Distortion arises when somebody polishes the tag alone, leaving a shallow concavity in the middle of the pane. In a small light that is disproportionately noticeable, which is why we never work that way.
There is scratching in addition to the etching.
Both respond to the same sequence of graded abrasion and polishing, and both are addressed in one attendance. Depth determines the outcome, and a particularly deep incision occasionally cannot be recovered.
What does the work cost?
Set against a replacement, which on this kind of window means glass, joinery, putty, decoration and making good, restoration comes in up to 90 per cent below. Our figure depends on the number of lights, the extent and depth of the damage, the nature of the glass and whether protective film is to follow. It is confirmed in writing beforehand. No lazy contractors. No hidden fees.
Is it worth notifying our insurers?
Compare our figure with the excess first. A single light restored will often fall beneath it, in which case notification achieves nothing and still registers at renewal. An entire sash or frontage usually justifies a claim.
The damage has been there some months. Is it still treatable?
Nearly always. Time makes the work slower rather than impossible, because weathering settles into the etched surface and more has to be taken back before clarity returns.
Do you work across several properties for one estate or agent?
Yes. A single contact covers the portfolio, the reporting format stays the same across every address and the invoicing is consolidated.
How should we begin?
Send photographs of each affected light, from outside and from within the room, and tell us whether the building is listed and who holds the estate interest. That is usually enough for us to identify the damage, indicate a figure, and begin any approvals in parallel.
Do you need graffiti removed from your property? Get a fast, hassle-free quote today! Click here to get a professional graffiti removal quote or call us today on: 020 8050 5997
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