Yes, a clay bar can effectively remove old wax from your vehicle's surface. Here’s a summary of how it works and what you should know:

1. Functionality of Clay Bars: Clay bars are designed to remove bonded contaminants from the paint surface, which includes not only dirt and grime but also old wax and sealants. They work by physically pulling these contaminants away from the paint when used properly.

2. Effectiveness: When you use a clay bar, it can remove most unwanted bonded road grime, including old wax. This process helps prepare the surface for a new layer of wax or sealant, ensuring better adhesion and a more vibrant finish.

3. Caution: While clay bars are effective, they can also be abrasive. If not used correctly, they might mar or scratch the clear coat of your vehicle. Therefore, it's essential to use them with a lubricant and follow the manufacturer's instructions.

Visual References

Here are some images related to clay bars and their use in car detailing:

Using a clay bar can significantly enhance the appearance of your vehicle by removing old wax and preparing the surface for a fresh application.