Light etch marks come out with marble polishing powder, worked over the dull area with a damp cloth or felt pad until the shine matches the surrounding stone. An etch is not dirt — the acid has dissolved a shallow layer of the polished surface — which is why no cleaner, however strong, will remove it, and why stronger cleaners tend to widen the damage. Deeper etching, where you can feel the mark with a fingertip, needs a professional to re-hone and re-polish the whole surface so the repair does not show as a patch.
Confirm it is an etch first
Wet the mark with a little water. A stain stays visible and stays darker. An etch briefly disappears while wet — because the water fills the roughened surface and mimics the polish — then returns as it dries.
Why cleaning cannot fix it
Marble is calcium carbonate. Acid dissolves calcium carbonate, and that reaction does not need the acid to soak in — it happens the moment the liquid touches the polished surface. This is why marble behaves so differently from granite or quartz, and why the fix for a dull mark is not a stronger cleaner.
Stain or etch — the difference that decides everything
| Stain | Etch | |
|---|---|---|
| What it is | A substance absorbed into the stone’s pores. | Acid has corroded the polished surface itself. |
| How it looks | Darker than the surrounding marble. | Lighter, duller or chalky — sometimes only visible at an angle. |
| Usual causes | oil, coffee, wine, grease, ink, rust from metal | lemon, vinegar, wine, tomato, fizzy drinks, many household cleaners |
| The fix | Draw it back out with a poultice. | Re-polish with marble polishing powder. Deep etches need a professional. |
| Prevented by | Sealing. A sealer slows absorption, buying you time to wipe. | Nothing you apply. Only keeping acid off the surface — a sealer does not prevent etching. |
Polishing out a light mark
- Clean and dry the area first — polishing grit into a dirty surface makes fine scratches.
- Dampen the mark with a little water.
- Sprinkle marble polishing powder over it.
- Work it with a damp cloth or felt pad in small circles, with light pressure, for a few minutes.
- Wipe clean and check at a low angle against the light. Repeat rather than pressing harder.
- Blend outward into the surrounding area so the repair does not end in a visible edge.
When to stop and call a professional
- The etch or scratch is deep enough to catch a fingernail.
- The damage covers a large area rather than one spot — patch-polishing a wide area leaves visible bright spots.
- The marble is honed and you want the mark gone. Polishing powder puts a shine where there was none.
- There is yellowing, cracking or chipping.
- The table is antique or the slab is thin — both raise the cost of a mistake well above the cost of advice.
Frequently asked questions
Will polishing powder work on honed marble?
It is designed for polished finishes. On honed marble it can create a shiny patch that looks worse than the etch — which is part of why honed marble hides etching in the first place.
Can I prevent etching entirely?
Only by keeping acid off the surface. No product applied to marble prevents it, sealers included.
Is it worth replacing an etched table?
Rarely. Professional re-polishing costs a fraction of a new table and the result is usually indistinguishable from new.
Related guides
Sources
- Natural Stone Institute — Cleaning Products for Natural Stone — view
- Natural Stone Institute — Removing Stains from Stone — view
This is one part of looking after stone furniture. For how the material behaves in the first place, and which pieces suit which rooms, see Marble Furniture: The Complete Buyer’s Guide.