5 Great Ways to Tackle Water Spots on Your Car’s Exterior

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Water spots being removed while exterior detailing is done on a car

Water spots can be a frustrating issue for car owners, leaving unsightly marks on the exterior surface. These spots are caused by mineral deposits in the water that can etch into the paintwork if not addressed promptly. In this article, we will discuss effective methods to tackle water spots on your car’s exterior. Big’s Mobile, the leading exterior mobile auto detailing service in Seattle & Los Angeles, offers expert solutions to eliminate water spots and restore the pristine appearance of your vehicle.

Understanding Water Spots and Their Causes

Water spots is one of the most common problems to work on when it comes to professional exterior detailing of cars. They occur when droplets of water evaporate, leaving behind mineral deposits such as calcium and magnesium. These minerals are present in varying concentrations in tap water and can create stubborn stains on your car’s paintwork. Additionally, if water droplets are left to dry on the surface of the car under the sun, the heat can accelerate the formation of water spots, making them more challenging to remove.

Effective Methods to Remove Water Spots

1. Quick Rinse and Dry

As soon as you notice water spots on your car, it’s essential to act swiftly. Begin by giving your car a quick rinse with clean water to remove any loose dirt or contaminants. Next, use a soft microfiber towel to gently dry the surface, ensuring that no water droplets are left behind. This method may work for mild water spots that haven’t etched into the paint.

2. Vinegar Solution

Vinegar is a natural cleaning agent that can effectively dissolve mineral deposits. Create a mixture of equal parts vinegar and water in a spray bottle. Spray the solution onto the affected areas and let it sit for a few minutes. Then, use a microfiber cloth or a soft brush to gently scrub the water spots. Rinse the area with clean water and dry it thoroughly.

3. Clay Bar Treatment

A clay bar is a specialized detailing tool that can remove contaminants from the surface of the paint, including water spots. Start by washing your car with a pH-neutral car wash shampoo and rinsing it thoroughly. Then, lubricate the surface with a clay bar lubricant. Gently glide the clay bar over the water spots, applying light pressure. The clay bar will pick up the mineral deposits, leaving the surface smooth and spot-free. Rinse the area and dry it thoroughly.

4. Polish and Wax

For stubborn water spots that have etched into the paint, polishing may be required. Choose a high-quality automotive polish suitable for your car’s paint type. Apply a small amount of polish to a foam or microfiber applicator pad and work it into the affected areas using circular motions. Polish the surface until the water spots are no longer visible. After polishing, apply a coat of wax to protect the paint and enhance its shine. Now you might ask: Polish vs Wax, which one is better for your car? It depends. Do your research wisely with our tips to give your car a pristine look!

5. Seek Professional Detailing Services

If you’re unable to remove water spots using DIY methods or if the spots have caused severe damage to the paint, it’s advisable to seek professional detailing services.  Big’s Mobile offers the best mobile detailing in Seattle & Los Angeles, specializing in exterior auto detailing. Their expert detailers have the knowledge, experience, and professional-grade products to safely and effectively remove water spots, restoring your car’s exterior to its original glory.

Preventing Future Water Spots

Prevention is key to avoiding water spots on your car’s exterior. Here are some preventive measures you can take:

  • Regular Washing: Wash your car regularly using a pH-neutral car wash shampoo to remove dirt and contaminants that can contribute to water spots.
  • Proper Drying: After washing your car, dry it thoroughly with a soft microfiber towel to prevent water droplets from evaporating and leaving behind mineral deposits.
  • Avoid Direct Sunlight: Whenever possible, park your car in a shaded area to prevent water droplets from drying quickly under the sun and causing water spots.
  • Use a Water Softener: If your area has hard water, consider using a water softener or a water filter for car washing to minimize the mineral content in the water.


Water spots on your car’s exterior can be a nuisance, but with the right techniques, they can be effectively removed. Whether you opt for DIY methods or seek professional detailing services from  Big’s Mobile, it’s crucial to address water spots promptly to prevent further damage to your car’s paintwork. Remember to take preventive measures to minimize the occurrence of water spots and keep your car looking its best.

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These blogs are meant purely for education and demonstration purposes. It contains only general information and may not account for specific issues related to your particular vehicle or situation. All content provided on this blog is for informational purposes only. Read full disclaimer.

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