The spraying methods for aluminum alloy casement doors primarily include:

1. Electrostatic Spraying: Utilizes static electricity to ensure an even coating of powder paint, providing excellent adhesion and durability.

2. Liquid Spraying: Involves using a spray gun to apply liquid paint, allowing for various colors and gloss finishes.

3. Hot-Dip Coating: Immerses the aluminum door in molten paint, forming a robust protective layer, often enhancing corrosion resistance.

4. Anodizing: An electrochemical process that creates a protective oxide layer on the surface, offering good protection and aesthetic appeal.

5. Powder Coating: Involves spraying powder paint that is then baked at high temperatures, resulting in a uniform and durable finish.