If you don't clay bar your car, several negative consequences can arise, primarily related to the condition of your vehicle's paint and overall appearance. Here are some key points to consider:

1. Contaminants Build-Up: Over time, your car's paint can accumulate various contaminants such as dirt, tree sap, industrial fallout, and brake dust. If these contaminants are not removed, they can bond to the paint surface, making it rough and dull. This can lead to a less appealing appearance and can even affect the effectiveness of waxes and sealants applied later.

2. Paint Damage: Leaving contaminants on the paint can lead to more serious issues, such as etching or staining. Some contaminants can cause chemical reactions with the paint, leading to permanent damage that may require professional repainting.

3. Reduced Shine and Protection: A clay bar treatment prepares the surface for waxing or sealing. If you skip this step, the wax or sealant may not adhere properly, resulting in reduced shine and protection against environmental elements.

4. Increased Maintenance: Without regular clay barring, you may find yourself needing to wash and polish your car more frequently to maintain its appearance. This can lead to more time and money spent on car care.

5. Potential for Swirl Marks: If you attempt to clean your car without clay barring first, you might inadvertently create swirl marks in the paint when using other cleaning methods. Clay barring helps to ensure a smooth surface, reducing the risk of such damage.

In summary, neglecting to clay bar your car can lead to a range of issues from aesthetic problems to potential paint damage, making it an important step in regular car maintenance.

Here are some images related to clay barring for visual reference: