How to Use Mufflex Car Care Trim Cera: Clean: Ensure the plastic and rubber surfaces are clean and dry before application. Apply: Using a clean applicator pad or cloth, apply a small amount of Trim Cera onto the surface. Spread: Spread the product evenly across the surface, covering all desired areas. Buff: Allow the product to dry for a few minutes, then buff off any excess with a clean, dry cloth. Admire: Step back and admire the restored shine and rejuvenated appearance of your car's trims and rubber parts!