The environment must be free from dust and contaminants, with a temperature between 18 and 24°C and relative humidity from 40% to 75%. The wooden item must have a temperature between 18°C and 22°C and relative humidity from 8% to 14%. The coating system must be chosen in accordance with the type of item. The viscosity must be suitable for the application system. The mixing (in two or more-component products) must be done according to the proportions indicated by the coating manufacturer. The items must be well prepared (sanded, cleaned and reduced, if intended to be worked on line). The drying tunnel, when available, must be at the required temperature. The application equipment (guns, pumps, pipes, fog coating devices) must be perfectly clean, in particular the compressor air must be dehydrated and oil-free. The coating must be well stirred before application.