This is the opposite of an all to common assumption that extreme measures given the contaminants should be used on exterior marble cleaning.
Cleaning old marble headstones.
If there is growth remove using a wooden scraper.
Headstones can be very porous and can soak up the cleaning solution before it has a chance to work.
Spraying down the headstone first will help maximize the effectiveness of the cleaning solution.
Pre wet the stone with clean water.
Regardless of what kind of stone you are cleaning the first rule is always to be as gentle as possible.
Clean a marble gravestone.
Marble needs to be treated even more gently than granite.
Most common gravestones are likely to be sandstone slate marble limestone or granite although there are many other possible options.
I have been cleaning and restoring old grave markers for a number of years.
In knowing how to clean a marble headstone properly you adopt the gentlest least invasive practices to preserve the longevity of the stone.
Only marble that is in good condition should be cleaned.
Rinse and wipe the marble headstone once all of the debris has been removed by the soapy water mixture rinse the entire surface of the marble headstone thoroughly with clean water and a clean cloth.
It was very effective with no damage.
How to clean a marble headstone.
I tried it on some old marble foot markers.
Cleaning weak marble can result in further irreparable damage.
Different types will require different cleaning methods.
Steps to clean a marble headstone.
Soak the stone with water to saturate any growth that may be present.
You want to keep the marble wet throughout the cleaning process by continually wiping the marble headstone with a cloth and clean water.
When the product wet and forget became available in the usa i was skeptical about using it on old sandstone or marble markers.
How to clean marble headstones.
It is important that you know what type of stone you are dealing with.
I talked to the technical folks at wet and forget.