Using a rubbing compound on the entire car is generally not recommended, as it is an abrasive product designed for heavy-duty paint correction. Rubbing compounds are typically used to address severe paint imperfections like deep scratches, oxidation, or heavy swirl marks. Here’s why you should be cautious:

When It's Appropriate to Use Rubbing Compound:

1. Severe Paint Imperfections: Rubbing compound is effective for restoring paint with deep scratches, heavy oxidation, or significant surface damage that lighter polishes can't fix.
2. Spot Treatment: It is best used in specific areas where the damage is noticeable rather than across the entire car.

Why It’s Not Ideal for Full-Car Use:

1. Aggressive Abrasion: Rubbing compounds are more abrasive than regular polishes. Using it across the entire surface can strip away too much clear coat, leading to long-term damage if not handled properly.
2. Loss of Shine: Rubbing compounds can leave the paint looking dull or hazy if overused. After applying a rubbing compound, a finer polish is often needed to restore the car’s glossy finish.
3. Risk of Uneven Results: Applying a rubbing compound to the whole car without proper technique can lead to uneven paint thickness or swirl marks, especially if applied by hand or with the wrong tools.

What to Do Instead:

• Use a Polish for Light to Moderate Imperfections: If your car has mild imperfections, a regular polish will be sufficient for the entire surface.
• Clay Bar for Surface Contaminants: If the goal is to remove contaminants, consider using a clay bar, which is much gentler on the paint.
• Professional Help for Severe Cases: For cars with widespread heavy paint damage, it’s best to consult a professional for machine polishing and paint correction.

In summary, rubbing compound is best reserved for spot treatments or areas that require more intensive restoration. For general paint maintenance, a milder polish or wax is the better option.