P&S Finisher Peroxide Treatment is the final step in the Double Black Interior Cleaning System. It is designed to eliminate odor-causing molecules and organic stains, providing a thorough clean for your car's interior. Finisher breaks down odor-causing chemicals and removes any residual organic stains, while also sterilizing the surface to reduce the risk of mold and mildew growth. It is effective at reducing water stains and eliminating mold and mildew odors, ensuring that your car's interior is clean and fresh. P&S Finisher is a safe and effective choice because it breaks down into oxygen and water, leaving no chemical residue that requires further removal.