Carpet cleaning chemicals likely left residue or stripped floor finish. Deep clean with water and vinegar, then apply floor restorer like Rejuvenate or Bona Polish for your floor type. Multiple thin coats work best to restore shine.
Factory protective plastic coating can be removed using heat and plastic scrapers, followed by adhesive remover. Replace with modern PPF, ceramic coating, or maintain bare paint with regular waxing. Work slowly to avoid paint damage.
Clear paint protection film on lower windshield can reduce rock chip damage. Use quality PPF and professional installation. Cover 12-15 inches from bottom, below sightline.