The preparation of the surfaces to be treated is very important for the success of the work we are going to do; first of all, it is advisable to clean the surface to be sanded thoroughly from all those construction site residues such as: gravel, nails, etc., after which deposit 30 to 60 grams of product (2/3 tablespoons) per square meter; wet the powder until it obtains a milky consistency, then place the traditional sanding machine equipped with felt or with a weighted single-brush machine on the wet powder and work the surface for a few meters at a time without ever letting it dry. A patina of used product remains on the floor; it is advisable to remove the patina on a small area using a rag, in order to check the degree of polish obtained and, if necessary, repeat the operation. The reflex polish in contact with water on the surface must create a mush, with which we will polish. It must never be too dry, because it would not allow the machine to flow, nor should it be too liquid because it would not allow the polish to have the right chemical reaction. If too little water has been used and lapping marks have been created on the polished part, simply go over the part with the same water but opening the valve more. At the end of the polishing treatment, remove all the patina, using a neutral detergent such as: DETERGON R3, BIOSAN, it is recommended to rinse very well with clean water.