Shenzhen Alu Rapid Prototype Precision Co., Ltd.

Painting die-cast aluminum requires careful preparation and technique to ensure a smooth, durable finish. Here’s a concise step-by-step guide:

Materials Needed:Sandpaper (400-600 grit for smoothing, 800-1000 grit for fine sanding)

Degreaser or isopropyl alcohol

Primer (self-etching or metal-specific)

Acrylic or enamel paint suitable for metal

Clear coat (optional, for protection)

Paintbrushes, spray cans, or airbrush

Masking tape (for detailed areas)

Clean cloth

Protective gloves and mask

Well-ventilated workspace

Steps:

1.Clean the Surface:

Remove dirt, grease, or oils using a degreaser or isopropyl alcohol with a clean cloth.Rinse with water if needed and dry thoroughly to avoid residue.

2.Sand the Surface:

Lightly sand the die-cast aluminum with 400-600 grit sandpaper to remove any existing paint or oxidation and create a surface for paint adhesion.For a smoother finish, follow with 800-1000 grit sandpaper.Wipe away dust with a clean, damp cloth and dry completely.

3.Mask Areas (Optional):

Use masking tape to cover areas you don’t want painted (e.g., windows, tires, or detailed parts).

4.Apply Primer:

Use a self-etching or metal-specific primer for better adhesion on aluminum.Apply thin, even coats (spray or brush) in a well-ventilated area.Let dry fully (check primer can for drying time, usually 1-2 hours).

5.Paint the Model:

Choose acrylic or enamel paint designed for metal surfaces.

Apply thin, even layers using a spray can, airbrush, or fine brush to avoid drips or pooling.Allow each coat to dry (15-30 minutes for spray, longer for brush) before applying the next. 2-3 coats are typically sufficient.Work in a dust-free, well-ventilated area to prevent imperfections.

6.Add Details (Optional):

Use fine brushes for small details like headlights, grilles, or logos.

Remove masking tape carefully once the paint is dry to the touch.

7.Apply Clear Coat (Optional):

For added durability and a glossy or matte finish, apply a clear coat compatible with your paint type.

Use thin layers and let dry fully (up to 24 hours).

8.Cure and Handle:

Allow the model to cure for 24-48 hours in a dry, dust-free environment.

Handle gently to avoid fingerprints or scratches on the new paint.