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“Our marble foyer had several acid stains from our kitty cats throw up! Mario Perez and his helper arrived at 8am to start the project. Their preparation was amazing — and the result is a foyer that looks brand new.”
— Daniel Testa, verified residential client
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Project: Deep stain extraction on a Calacatta marble vanity in a Georgetown master bathroom — extraction of a 6-inch dark stain (cosmetic foundation makeup) that had been there for over a year, plus full re-polishing of the 18 sf vanity top. Two-day project (poultice extraction Day 1, polish Day 2); stain fully removed, no shadow remaining.
The project at a glance
- Location: Georgetown, Washington DC
- Stone: Calacatta marble, polished finish
- Surface: 18 sf master bath double vanity top
- Age of installation: 6 years
- Damage: 6-inch dark cosmetic stain (had been there 14 months), light surrounding etching from acidic skincare products, generalized polish dulling around the sinks
- Project span: 2 days (poultice extraction Day 1, polish Day 2)
- Crew: 2 technicians (1 senior + 1 mid-level)
The damage we found
The homeowner had spilled a full bottle of liquid foundation makeup on the right vanity top approximately 14 months before our visit. She had wiped it immediately but the stone had already absorbed enough pigment to leave a permanent dark patch about 6 inches across. Multiple attempts at home cleaning had not improved it.
- Foundation makeup stain: A roughly oval dark patch on the right side of the vanity, deeper in the center where the spill had pooled. The stain was below the surface — visible through the polished finish but not feelable as a texture change.
- Light etching from skincare products: Around both sinks, a faint matte ring was visible where toner, vitamin C serum, and chemical exfoliants had splashed over the years. Each individual etch was tiny but collectively they produced a “tired” zone around each basin.
- Generalized polish dulling: Standard daily-use wear in the basin areas — accumulated soap residue and frequent wiping with a non-stone-safe cleaner had reduced the original mirror polish to a soft satin.
- No structural issues: The vanity itself was sound — no chips, no cracks, no edge damage. The bold gold-and-grey Calacatta veining was completely intact.
The restoration process
- Site protection (Day 1). The vanity hardware (faucets, drains, soap dispensers) was masked. Adjacent walnut cabinetry and the marble backsplash were protected. The mirror above the vanity was covered to protect from poultice splashes.
- Stain identification. Confirmed the stain as oil/pigment-based via simple drop test (water beading vs. absorption pattern). This determined our poultice chemistry — a degreasing/pigment-extracting paste rather than rust or organic-stain treatment.
- Poultice application (Day 1). Stone-safe extracting paste applied at 1/4 inch thickness directly over the stain area, extending 1 inch beyond the visible edge in all directions. Covered with plastic film and edge-taped to maintain moisture.
- 24-hour dwell. The poultice draws the stain up out of the stone as it dries. We left the homeowner with a “do not disturb” sign on the vanity and returned 24 hours later.
- Poultice removal and assessment (Day 2). The dried poultice was removed and disposed of. Stained pigment had transferred into the poultice — visible discoloration in the dried paste. The stain on the marble was approximately 90% reduced after one application.
- Second poultice (lighter, Day 2). A second light application of poultice over the residual stain area. 4-hour dwell to extract the final residue. Result: stain fully extracted, no visible shadow.
- Diamond honing (Day 2). The entire vanity top honed at 800, 1500, and 3000 grit — both to remove the light etching from skincare products and to ensure uniform finish across the area where poultice was applied.
- Polishing (Day 2). Final polishing with chemical polishing pads to restore the original Calacatta mirror finish.
- Sealing. Premium impregnating sealer applied — this is critical on bathroom vanities where the surface sees daily contact with cosmetics, soaps, and skincare products that can stain.
The outcome
By end of Day 2:
- Cosmetic stain fully extracted; no visible shadow even in raking light
- Surrounding etching from skincare products fully removed
- Original Calacatta mirror polish restored across all 18 sf
- Surface re-sealed against future stain absorption
- Calacatta veining at full visual depth — no longer competing with the dark stain for visual attention
The homeowner sent us a thank-you note a week later: “I had given up hope. I was budgeting for a full vanity replacement next year. You saved me $8,000+ and the disruption of a bathroom remodel.”
Why this project matters for similar marble stain situations
Three takeaways for homeowners with marble stain damage:
- Old stains are still extractable. A 14-month-old stain is no harder to extract than a 14-day-old stain — once a pigment is absorbed, it doesn’t bond more strongly over time. We’ve extracted stains 5+ years old. The poultice chemistry doesn’t care about age.
- Most “permanent” marble damage isn’t permanent. Stains, etches, and light scratches are surface-and-near-surface damage on stone that’s typically 1-2 inches thick. Restoration removes microscopic amounts of stone to address damage that looks catastrophic.
- Bathroom skincare products are slowly damaging marble vanities. Vitamin C serum, glycolic acid, salicylic acid, and acidic toners all etch marble. Most homeowners don’t realize this until the cumulative damage is visible. Marble Armor or a cosmetic tray addresses this risk.
Cost range for similar projects
- Marble vanity stain extraction + re-polish (15-30 sf): $700–$1,500
- Single deep stain extraction (poultice work alone): $250–$500
- Marble Armor on bathroom vanity (added to restoration): $8–$14/sf
This particular project (18 sf with one large stain extraction) came in at the typical range.
Warranty
All Rose Restoration work is backed by our 1-year written workmanship warranty. Marble Armor installations carry an additional 10-year manufacturer-backed protection warranty against etching and staining.
Related services
- Marble stain removal — full guide to stain extraction
- Marble restoration in Washington DC — Rose’s DC service area
- Marble etch mark removal — for acid-related damage
- Calacatta marble restoration — Calacatta-specific service
- Marble Armor — long-term stain and etch protection
Frequently asked questions
How can a stain that’s been there over a year really be removed?
Poultice extraction works by chemistry, not by abrasion. The drying paste creates an osmotic pull that draws absorbed pigment back out of the stone over 24 hours. The age of the stain doesn’t matter — what matters is identifying the right poultice chemistry for the stain type.
What if the first poultice doesn’t fully remove the stain?
Multiple applications are normal for deep or large stains. Each application removes a percentage of the remaining pigment. We typically achieve 95%+ extraction within 2-3 applications. Very deep stains occasionally require 4+ applications.
Why does the whole vanity need to be polished, not just the stained area?
Spot-treating creates a visible “patch” on the surface — the polished area reads differently from the unpolished area. We always polish the entire surface uniformly to maintain a consistent finish.
How can I prevent this from happening again?
Three options: (1) cosmetic/skincare tray to keep products off the marble, (2) re-sealing every 2-3 years for ongoing protection, (3) Marble Armor for 10-year etch and stain protection. Most clients with bathroom marble opt for some combination.
Are there stains you can’t remove?
Rust stains and certain ink/dye stains are the most difficult — sometimes we achieve 80-90% reduction but not 100%. Deeply set tobacco/smoke staining on porous travertine can also be partially permanent. For marble specifically, true “non-removable” stains are rare.
Schedule a free marble stain assessment
For marble stain extraction in Washington DC, Georgetown, Bethesda, McLean, or anywhere across DC, MD, and VA: call 703-327-7676 or request a free in-home assessment. Senior technicians respond within 2 business hours. Most marble vanity stain extraction projects are quoted between $700 and $1,500.