A glass of Burgundy. A slice of lemon. A well-meaning housekeeper with the wrong cleaner. Acid damage on marble happens fast and looks permanent. It isn’t — when you know what you’re doing.
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Understanding the Damage
Etch marks are chemical burns, not stains. When an acidic substance contacts calcite-based stone — marble, limestone, travertine — it dissolves the calcium carbonate in the surface. What you see is not a stain sitting on top of the stone. The surface itself has been chemically altered, leaving a dull, slightly rough patch that no amount of cleaning will fix.
This is why DIY treatments and standard cleaning companies consistently fail. You’re not removing something — you’re reversing a chemical reaction at the microscopic level. That requires a calibrated process and, in the most advanced cases, a professional-grade restoration compound like RAKU No-Etch.
The Chemistry
Marble is composed primarily of calcite (calcium carbonate), a mineral that reacts immediately with any acid. The chemical reaction — CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂ — doesn’t require heat, pressure, or time. It happens on contact.
The result is a localized dissolution of the stone surface at a microscopic level. The crystal matrix is disrupted, light no longer reflects uniformly, and the characteristic dullness of an etch appears. No sealer prevents this. Sealers protect against staining — they cannot neutralize acid.
Reversing it requires mechanically removing the disrupted surface layer and restoring the crystal structure through a controlled abrasion and polishing process — or, in eligible cases, using a reactive compound like RAKU No-Etch that chemically reconstitutes the surface without material removal.
pH Reference: Red Wine 2.5 · Lemon Juice 2.0 · Vinegar 2.4 · Coffee/Tea 4.5
From assessment to restored
Advanced Treatment Technology
For surface-level acid damage where honing would remove more material than necessary, NYC Marble Care uses RAKU No-Etch — an Italian-engineered anti-acid compound for marble that chemically restores the surface gloss without abrasion. NYC Marble Care is a certified applicator, one of very few in the New York metro area. RAKU is PFAS-free and food-contact safe.
PFAS-Free Formula · Food-Contact Safe · Certified Applicator · Italian-Engineered · No Material Removal
Stone Types We Restore
Marble — Carrara, Calacatta, Statuario, Arabescato & more Limestone — Honed & polished; particularly susceptible to acid Travertine — Filled and unfilled surfaces, floors & walls Onyx — Translucent and backlit panels Terrazzo — Historic and modern composite surfaces Calcarenite — Specialty imported stone, historic brownstones
Common Questions
Can etch marks be fully removed, or will I always see something? In the overwhelming majority of cases, yes — etch marks can be fully removed with no trace. The only exceptions involve extremely deep etching where the stone has been significantly compromised, or very rare stone types where the original finish cannot be replicated. We’ll tell you honestly at assessment if we see any limitations.
How long does etch mark removal take? A single etch mark on a bathroom vanity or kitchen island can typically be addressed in one visit of a few hours. Larger surfaces with widespread etching — a full kitchen counter, a dining table, a bathroom floor — may require a half or full day. We provide a clear timeframe after the initial assessment.
Will the restored area match the rest of the surface? Yes. Our process is calibrated to match the original finish level — whether that’s a high gloss, a satin hone, or anything in between. In some cases, restoring a spot area looks so clean that clients ask us to treat the entire surface to bring everything to a uniform level.
My housekeeper used the wrong product on the entire floor. Can that be fixed? This is one of the most common calls we get. Full-surface re-honing and re-polishing is a routine part of our work. A floor that has been etched uniformly across its surface is actually often easier to restore than a spot etch, since the entire surface is brought to the same level in a single operation.
Do you work in occupied residences? Yes. Most of our residential work is done in occupied homes. We work cleanly, contain dust and residue carefully, and are accustomed to working around household staff, building management schedules, and clients who are home. We treat every property as if it’s our own.
Is RAKU No-Etch safe to use on kitchen counters near food prep? Yes. RAKU No-Etch has been independently laboratory-tested and certified as food-contact safe per European Union standards (DM 21/03/1973, Reg UE 1935/2004). It is also PFAS-free. We’re happy to share the documentation on request.
New York Metro Area
We serve luxury residential and commercial properties across Manhattan, Brooklyn, Queens, and Long Island. Every assessment is honest — we’ll tell you exactly what’s possible before any work begins.
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Serving · Manhattan · Brooklyn · Queens · The Bronx · Long Island · Westchester · New Jersey