Carry out an accurate cleaning by removing dust, all parts that are peeling off, grease and other contaminants. On substrates with old paints, prime with a coat of the product diluted to 30 %. On new substrates, primer with a coat of the product diluted to 40 %. Then apply a second coat diluted to 5 - 10 %.
The substrate must be dry; the presence of excessive humidity inside the substrate, during solar irradiation, can generate the formation of bubbles and the subsequent detachment of the coating.