Protect Your Trunk Edge | Simple Paint Protection Film Mod Tired of scratching your rear bumper when loading the trunk? This quick and simple DIY tutorial shows how to protect your BMW 3 Series with transparent Paint Protection Film (PPF). It’s invisible, durable, and prevents everyday damage from luggage and bags — perfect for any daily driver. 📋 Step-by-step process: 📏 Measure and cut the piece of transparent PPF slightly larger than the protection zone 🧼 Clean the top edge of the rear bump