STEP 3 – SANDSTONE

Observe sandstone carefully about its cleanliness and integrity. Obtain the type of dirt and stains. Then, using the information in the table below, make a list of the interventions to be done to thoroughly clean the sandstone

QUICK RECOVERY TABLE FOR   SANDSTONES
TYPE OF PROBLEM	U.S. GSA			PRO TIPS	BMC TIPS
	P.T.	causes of stains	stain removers
REMOVE STAINS
STAINS OF UNKNOWN ORIGN		Substances not well identified	LIQUID DETERGENTS BLEACH HYDROGEN PEROXIDE 6% DETERGENTS TYPE 'TIDE'
STAINS OF UNKNOWN ORIGN, REMOVING USING THE "NEST" METHOD		Substances not well identified	TRICHLORETHYLENE PERCHLORETHYLENE
OIL AND FAT STAINS		Oils and fats such as oil-based paints, lipstick, butter, cream, milk, peanut butter, hands lotions, mustard and deposits made of oils, lubricating oils and / or bituminous products	ACETONE WHITE SPIRIT
GREASY SMUDGES REMOVUNG BY COTTON SWAB		lubricating grease	ETHYL ALCOHOL METHYL ALCOHOL
LINSEED OIL STAINS, SOOTY DIRTY		linseed oil paints, soots	SODIUM BICARBONATE LIQUID BLEACH FOR LAUNDRY
ACRYLIC AND LACTIC PAINTS		acrylic and lactic paints	Methylene chloride paint stripper
ORGANIC STAINS		Organic matter, food desserts, flowers, leaves, tea, coffee, dung of birds or animals	HYDROGEN PEROXIDE 6%
IODINE STAINS		iodine	DENATURED ALCOHOL
URINE STAINS		urine	HYDROGEN PEROXIDE
INK AND DYE STAINS		non-metallic ink, dye	ETHYL ALCOHOL METHYL ALCOHOL HYDROGEN PEROXIDE 6% HYDROXIDE AMMONIUM
ADHESIVE RESIDUES		sticky adhesive residue	ACETONE ACQUARAGIA TOLUENE XYLENE METHYLENE CHLORIDE
MILDEW STAINS		mildew from mushrooms, algae or other living plants	BLEACH DETERSIVE DISHES
SILICONE STAINS		hardened silicon layers	METHYLENE CHLORIDE
MORTAR DEPOSITS AND STAINS		mortar, concrete	MURIATIC ACID DEFROSTING DETERGENTS
RUST STAINS		iron oxides, metal inks	SODIUM CITRATE SODIUM IDROSULFIT OXALIC ACID SODIUM HYPOCHLORITE RUST REMOVER
COPPER/BRONZE STAINS		bronze and copper oxides	CITRATE HYDROGEN SODIUM SODIUM TIOSOLPHATE AMMONIUM CLORUUM AMMONIUM HYDROXIDE EDTA
CLEANING AND TREATMENTS
DIRT BUILT-UP		colorations in general, stratified stains	SPECIFIC DETERGENTS
EFFLORESCENCE		sulfates of sodium, potassium, magnesium or calcium; Sodium nitrite, potassium and calcium; calcium carbonate; sodium chloride; silica
REMOVAL OF SOILING		bleaching solution	SODIUM HYPOCHLORITE
BLEACHED AREAS		bleach, sodium hypochlorite acid, acid detergents	OXALIC ACID LINSEED OIL
RISKS AND GENERAL WARNINGS