• Combining the methods is the most effective way to go - scrape the paint over large surfaces with a metal brush, then use sandpaper to handle nooks and crevices.
• You can use a cordless drill with an iron brush attached. This is a good option if you are shaving paint over large surfaces. Remember to use the earplugs when operating the drill.

Sand the metal until it is smooth. This will ensure the best paint durability. After sanding, wipe it off with a damp cloth one last time to remove dirt. advertisement

Part 2 of 3: Metal surface primer

1. 

   
   
   Choose an oil-based primer. Make sure primer and topcoat are compatible with each other. You will be using acrylic paint (the one best suited to metal paints), so choose an oil-based primer that is compatible with acrylic paints. You should also look for primers specifically designed for metals, as they have the best adhesion to metals.
   • Most primers come in a spray form for convenience, but if you prefer to use a brush, you can also buy primer that comes in a box or box.
   • Primer not only helps the paint to adhere to metal surfaces well, but also has the effect of uniformity of colors and defects that could not be handled before.

2. 

   Apply a primer. Spray the primer evenly over the entire metal surface. If you work outdoors, avoid spraying on a windy day. Be sure to shake the bottle of primer for about 2 minutes before using it.

3. 

   
   
   Wait for the primer to dry completely. The wait time for paint to dry will vary from paint to paint, so you should check the details on the paint can. The acrylic paint will adhere better and last longer if you paint on the completely dry primer. advertisement

Part 3 of 3: Coating

1. 

   Use a brush or spray a coat of acrylic paint. You can also use spray paint, but it will not last as long as painted on metal. Make sure the paint is evenly applied to the metal surface.
   • If you use a paint brush, don't over-dip the paint to prevent it from getting dirty and making the first coat too thick.

2. 

   
   
   Wait for the first coat to dry completely. Check the product information on drying time. If you do not let the first coat dry completely, the finish will not last. Luckily, acrylic paint dries up pretty quickly, so you'll need to get the job done in a day if you can find the time.

3. 

   Paint a second layer of acrylic. Paint as evenly as possible. A second coat will ensure your finished product has the best surface finish. Moreover, this coating also adds a protective layer on the metal surface, helping to prolong the life of the paint.
   • You can apply the first coat in one color, allow it to dry completely, then apply a second coat of different colors. This method is very suitable for painting logos on surfaces.
   • Acrylic paint is waterproof, so that means you can paint in many layers to achieve different effects.
   • When applying multiple coats, you need to wait for each coat to dry completely before applying the next one.

4. 

   Wait for the last coat to dry for 36-48 hours before using the item. If possible, paint in a location where you can leave the finished item in place without having to move to avoid accidentally damaging the finished surface. advertisement