For minor car paint scratches, toothpaste can provide a certain repair effect. This method is primarily applicable to fine scratches that only affect the clear coat. The abrasive particles in toothpaste can help fill in scratches through polishing, while its humectants blend the scratches with the car paint color. When applying, use a soft cloth to gently rub a small amount of toothpaste in circular motions, then rinse with clean water. However, note that this method has limited effectiveness on deep scratches where the primer is exposed. Post-treatment issues may include reduced gloss or temporary disappearance of scratches, particularly after rain or car washing. Moreover, frequent use of toothpaste may cause paint wear due to its abrasive nature, so it should only be used as a temporary solution. For severe scratches, professional touch-up paint or polishing is still required. For routine maintenance, specialized car wax or scratch repair products are recommended to ensure more durable and stable paint protection.