Shenzhen Alu Rapid Prototype Precision Co., Ltd.

When painting a die-cast car, the time you should wait after applying primer before painting depends on the type of primer used and environmental conditions. 

1.Typical Drying Time: Most primers for die-cast models (e.g., spray primers like Tamiya, Rust-Oleum, or automotive primers) require 30 minutes to 2 hours to dry to the touch, but you should wait 24 hours for the primer to fully cure before applying the topcoat. This ensures proper adhesion and prevents issues like bubbling or peeling.

2.Primer Type:

Solvent-Based Primers (e.g., enamel or lacquer): These dry faster (30–60 minutes to touch) but need 12–24 hours to cure fully.Water-Based Acrylic Primers: These may take slightly longer to dry (1–2 hours to touch) and still benefit from a 24-hour cure time.

3.Environmental Factors:

Temperature: Warmer conditions (e.g., 70–80°F or 21–27°C) speed up drying; colder temps slow it down.Humidity: High humidity (above 60%) can extend drying time. Aim for a dry, well-ventilated area.Ventilation: Good airflow helps the primer cure faster.

4.Tips for Die-Cast Cars:Ensure the die-cast surface is clean and free of oils or mold-release agents before priming (wash with soap and water or use isopropyl alcohol).Apply thin, even coats of primer to avoid runs or thick layers that take longer to cure.If sanding the primer for a smoother finish, wait until it’s fully cured (24 hours) to avoid damaging the surface.

5.Quick Check: If the primer feels tacky or smells strongly of solvent, it’s not fully cured. Wait longer.