When it comes to using a clay bar on your car, it is recommended to do so wet rather than dry. Here are some key points to consider:

1. Lubrication is Essential: Always use a clay bar lubricant or detailing spray when claying your car. This lubricant allows the clay to glide smoothly over the surface without scratching the paint. Applying the clay bar on a dry surface can lead to scratches and damage to the paintwork.

2. Process: Start by washing your car thoroughly to remove as much dirt and grime as possible. After washing, spray a small section of the car with the lubricant, then gently rub the clay bar back and forth over the lubricated area using light pressure.

3. Technique: Avoid using circular motions while claying, as this can create swirl marks. Instead, use straight back-and-forth motions.

4. Frequency: Depending on your environment and how often you wash your car, you may want to clay bar your vehicle every few months to maintain a smooth surface and prepare it for waxing or polishing.

Visual References

Here are some images that illustrate the clay bar process:

In summary, always clay bar your car wet with a proper lubricant to ensure the best results and protect your vehicle's paint.