Oxidation is a natural process that occurs when metal is exposed to oxygen and water. Unless it is galvanized, a metal surface will rust when exposed to exterior weather. If you would like to paint a rusted surface, dedicate yourself to thorough preparation, or adhesion difficulties will inevitably result. Rust removal is essential to promoting a durable, lasting finish. Fortunately, metal is strong enough to allow for rough removal techniques. Employ the correct tools, or the process may take much longer than it should.
Things You'll Need
- Pressure washer
- Protective eyewear
- Wire brush
- 80-grit sandpaper
- Steel wool
- 5-gallon bucket
- Red oxide primer
- 2- to 3-inch natural-bristled paintbrush
- Mineral spirits
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Eliminate as much rust as possible from exterior metal surfaces with a pressure washer. Skip this step if the rusted surface is located indoors.
Wear protective work gloves and eyewear. Scrape away loose rust fragments with a wire brush. Smooth the remaining rust particles with 80-grit sandpaper.
Coat the rusted surface with an iron oxide primer before you paint it. Use a natural-bristled brush to apply the primer. Allow the iron oxide primer to dry for two hours before you paint.