Cleaning weak marble can result in further irreparable damage.
White marble gravestone cleaner.
Make and apply a poultice if steps 1 to 3 fail to remove the mold and mildew stains on the marble headstone make a poultice with cotton balls hydrogen peroxide and ammonia.
A more widely available product wet forget moss mold mildew and algae stain remover 29 98 a gallon at home depot is advertised as being suitable for cleaning headstones.
Different types will require different cleaning methods.
Clean a marble gravestone.
Pre wet the stone with clean water.
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It is important that you know what type of stone you are dealing with.
If these are present it may be best to leave it as is.
Soak the stone with water to saturate any growth that may be present.
Only marble that is in good condition should be cleaned.
If there is growth remove using a wooden scraper.
An undiluted cleaning agent may leave a residue in the marble s pores.
Marble needs to be treated even more gently than granite.
Wetting the marble first will provide better cleaner spread on the surface and make rinsing easier.
As with interior marble cleaning soak the cemetery headstone with water before adding a cleaner.
Cleaning a white marble gravestone requires care and some special tools but it is a relatively easy task that can be accomplished in one afternoon.
Remove as much of the lichen and moss with your hands as possible.