Marble fireplace stain removal This marble fireplace had been covered for years by appliances and collected dust and humidity stains from the brick wall. The cleaning and treatment to remove the stains were over a period of only 9 hours instead of 24 but proved very effective. 1 Overview of fireplace before the cleaning. 2 The hearth looks dirty and stained. 3 The surrounding stone has brownish humidity stains that normally take 24h to remove. 4 Close up of the main stain and rust mark that caused the owner to contact us. 5 After 8 hours of cleaning and stain removal there's only a small mark left and the owner is happy with a short repair session. 6 Another look at the hearth and surround stone looks much cleaner and nicer. 7 The hearth shows only minor rust stains near where the fire used to be burning this is usually caused by the metalwork that holds the logs. 8 Overview at the end of the day looks cleaner and considering the short amount of time it was treated for, it made a big improvement. see more repairs