Painting metal can be a simple task if done correctly. Unlike wood, there is no need to take into account the color in which the object was painted earlier. However, you must do it carefully and choose the appropriate paint. Always read labels and be especially delicate with rusty surfaces. While it may seem like the metal needs less preparation for painting, this is not always the case and depends on the condition of the metal you intend to paint.
Step 1. Read the label
Make sure the primer and paint are compatible. If not, then painting doesn't make any sense. Check the drying time to plan your work properly. This is of paramount importance when painting.
Step 2. Clean off paint residues, dirt, grease and dirt from the metal surface
If you don't, the freshly painted surface will quickly flake off. Even traces of oil make the surface unpainted, so clean the metal thoroughly, even if you don't think it is necessary.
Step 3. Sand the metal with sandpaper
This way, you make the surface ideal for painting, and it will last you much longer. The rougher the metal surface, the better the paint will adhere to it.
Step 4. Apply zinc chromate primer if working on rusty surfaces
Clean off any rust and dust, then coat the metal with a primer. You do not need to throw away the item if it is covered with rust. A good paint job will save you time and money in such cases.
Step 5. Apply a second coat of primer
Since the metal is highly susceptible to oxidation, a thick layer of primer will be very helpful. This not only strengthens the surface, but also protects it from future corrosion. Remember to make sure the paint is compatible with the primer you are using.
Step 6. Paint
Acrylic latex paint works best for metal. Cheap metal or spey paint can quickly wear off and you have to repeat the process. Try to cover the surface evenly to avoid some problems later on.