Identifying the difference between a painted alloy wheel and a diamond-cut alloy wheel, you can look for the following characteristics:

1. Finishing Technique:

   – Painted Alloy Wheel: A painted alloy wheel typically has a smooth and consistent colour coating. The entire wheel surface is covered with paint, providing a uniform appearance. More often as well, the painted alloy wheel has a rounded or multi-directional spoke. 

   Diamond Cut Alloy Wheel: A diamond-cut alloy wheel has a distinct finish achieved using a specialised alloy wheel lathe. The face of the wheel is machined or cut with diamond-tipped tools, creating a delicate, reflective pattern. The rest of the wheel may have a painted or powder-coated finish. The spokes on a diamond-cut alloy wheel have a flatter profile, allowing for machining. 

2. Texture and Shine:

   Painted Alloy Wheel: The painted surface of an alloy wheel is usually smooth to the touch. Depending on the desired look, it may have a glossy, satin, or matte finish.

   – Diamond Cut Alloy Wheel: The diamond-cut face of an alloy wheel has a distinctive texture due to the machining process. It appears shiny and reflective, similar to a mirror finish, with fine lines or grooves running across the surface.

3. Color Variation:

   – Painted Alloy Wheel: Painted alloy wheels typically have a consistent colour across the entire surface. The colour choice may vary depending on the manufacturer or personal preference.

   – Diamond Cut Alloy Wheel: The diamond-cut face of an alloy wheel is usually silver or metallic in colour, providing a bright and reflective appearance. The rest of the wheel, including the spokes and inner areas, may have a different colour or finish.

4. Maintenance and Repair:

   – Painted Alloy Wheel: Painted alloy wheels require regular cleaning and maintenance to preserve their appearance. Scratches or chips in the paint can be touched up or repainted.

   Diamond-Cut Alloy Wheel: Diamond-cut alloy wheels are more susceptible to damage and require specialised care. If the diamond-cut face is damaged, it may need to be machined again or repaired by professionals experienced in diamond-cut wheel refurbishment.

So that you know, the presence of a diamond-cut face does not necessarily mean the entire wheel is diamond-cut. Many alloy wheels combine diamond-cut and painted sections to achieve a unique design. To accurately determine the wheel type, it is best to look over the surface and consult the manufacturer’s specifications or seek professional assistance.