Water spots on cars are mineral deposits left behind when water evaporates from the surface of the vehicle. Typically, these spots occur when water containing minerals such as calcium and magnesium dries on the car's surface. This often happens during car washes with hard water or when rainwater evaporates off the vehicle. If left untreated, water spots can become more difficult to remove and may even etch the paintwork if they're particularly stubborn or left for extended periods.

Removing water spots from your car can be done with various methods depending on the severity of the spots and the type of surface you're dealing with. Here's a step-by-step guide to efficiently tackle water spots on your car, starting with the least aggressive and easiest, and stepping it up for more severe water spots:

1. Wash with an acidic car wash:

For light water spots, a wash with an acidic car wash like Fireball PH3 may suffice and is worth trying first. This soap, with a pH level of 3, dissolves minerals and grime, effectively removing most light water spots quickly and easily. Note that it may also remove waxes and some sealants, requiring reapplication.

2. Use a Water Spot Remover:

Water spot removers like Chemical Guys Heavy Duty Water Spot Remover are acidic gels or sprays designed to dissolve and remove most surface water spots effectively. These products are stronger and more concentrated than acidic washes.

How to Use a Water Spot Remover:

• Work out of direct sunlight for best results.
• Clean the area to remove any loose dirt, debris, or abrasive contamination.
• Spray Chemical Guys window cleaner onto a workhorse microfiber towel.
• Clean the surface thoroughly to maximize exposure to water spots.
• Wipe dry with a waffle weave towel.
• Apply 3-5 dots of Heavy Duty Water Spot Remover over a 2’ x 2’ area with a plush microfiber applicator pad.
• Wipe with a Workhorse Microfiber Cloth.
• Re-clean the area with plenty of water using a spray bottle to neutralize the water spot gel.
• Repeat as necessary for stubborn water spots.
• Seal the area with a product like Autostolz Enhanced Wax or Fireball Angel Tears to prevent future contamination and water spot etching for up to 12 months.

3. Clay with a Clay Bar:

A clay bar can effectively remove stubborn water spots. Use a lubricant such as quick detailer spray or clay lubricant and gently rub the clay bar over the spots. The clay will pick up the mineral deposits, leaving the surface smooth. Work in small sections at a time, and avoid dropping the clay to prevent grit embedding.

4. Polishing out water spots:

For severe water spots or ones that have etched into the paint, polishing the affected area may be necessary. Polishing removes the top layer of paint/clearcoat/glass, revealing smooth, shiny paint. We recommend machine polishing with a Dual Action random orbital polisher like the Rockcar 15 for efficient and even results.

Choosing the Right Polish and Pad:

• For one-step polishing, consider using Autostolz One Step polish paired with the appropriate polishing pad based on the paint type (e.g., Autostolz Blue Euro Pads for harder European paint).
• Replace or clean polishing pads regularly to maintain effectiveness.

What Not to Use:

Avoid using steel wool or retail bathroom water spot kits like barkeepers’ friend, as these products can scratch and damage the vehicle's glass and clearcoat.

Preventing Water Spots:

To reduce water spots in the future, consider:

1. Applying a layer of protection such as Autostolz Enhanced Spray Wax or Fireball Angel Tears Ceramic Coating.
2. Using a quality car wash like Autostolz Premium Car Wash that contains Si)2 to improve water beading.
3. Employing a drying aid like Autostolz Enhanced Spray Wax or Chemical Guys Afterwash.
4. Using a quality absorbent drying towel or air blower like the Rockcar Performer or Metrovac Air Dryer.

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