Painting Aluminum Siding
- Clean the siding with a phosphate-free soap or general purpose cleaning solution and a scrub brush. Let it dry for two to three days.
- Prime the siding with a thinned down, oil-based, metal priming paint. Thin one gallon of oil-based primer with one pint of paint thinner.
- Finish with a high-quality, 100-percent acrylic latex exterior house paint. A paint formulated for metal siding is even better. Apply within 48 hours of applying the primer.
Paint a Small Piece of Aluminum
- Degrease the piece with phosphate-free soap and water. Let it dry completely.
- Apply a wash primer with a spray gun. Mix it exactly to the manufacturer's directions.
- Apply and polyurethane paint or acrylic paint to the primed piece.
Things You Will Need
- Phosphate-free soap
- Scrub brush
- Oil-based metal priming paint
- Paint thinner
- High-quality, 100-percent acrylic latex exterior house paint
- Wash primer
- Spray gun
- Polyurethane or acrylic paint
- Paint brushes
- Consider taking small pieces to a custom coating shop for a chemical immersion to prime the piece to be painted.
- Prime and paint siding on an overcast day.
- Having the primer tinted to half-strength the color of the finish paint.