See also:

Reporting safety defects (US only)
If you believe that your vehicle has a defect which could cause a crash or could cause injury or death, you should immediately inform the National Highway Traffic Safety Administration (NHTSA) ...

Washing
Wash dirt off with a wet sponge and plenty of water. Clean the vehicle thoroughly using a mild soap, a special vehicle soap or general purpose dishwashing liquid mixed with clean, lukewarm (ne ...

Most common factors contributing to vehicle corrosion
- The accumulation of moisture-retaining dirt and debris in body panel sections, cavities, and other areas. - Damage to paint and other protective coatings caused by gravel and stone chips or ...