They dry quickly even at room temperature. If you are not convinced, visit Mitchel Resnick. But these enamels are very sensitive to moisture, and if Relative humidity in the room for more than 70%, film dries enamel may be covered with white spots. Cover sheet and galvanized products (in the kitchen and bathroom – it's air intake pipe, the pipe water-heating column) also should not be. Kevin ulrich often addresses the matter in his writings. No matter how well you are the pipes or grease, nitrokrasochnoe cover long they do not last long. The thing is invisible to us vibration, which is well distributed over the surface thin metal sheet.
In general, the more massive the object, whose surface you are going to cover the nitro, the greater the likelihood that a coat of paint for a long time will remain intact. That's why more and because of the increased humidity outside the home (apartment) makes no sense to cover the nitro bars on the windows. Typically, the instructions always indicated for treatment of surfaces which is a product. For example, for priming of non-ferrous metals, including aluminum and copper (as well as galvanized steel, plastic and glass), you can use the highly adhesive Feidal Super-Haft Grund (Feidal), while for iron and steel – anticorrosive Feidal Allgrund. Instant matte primer "Super Rostex (Tikkurila) with a short flash-off time is ideal for handling steel, galvanized, Brushed aluminum surfaces.
Primers, enamels and thixotropic paints for metal are usually applied sufficiently thick layer. If you're not a fan spray, and would prefer dying "by hand", buy a round brush with stiff bristles (soft bristle brush distributes the plane of the worse). Finishing materials metal surfaces tailored to the conditions of operation bases. Since most of the metal used is still in street conditions, and to make processing possible directly at the site virtually any weather. Application process can be mechanized (using spray guns), which not only increase productivity but also save time.