Will this interfere with my trunk when it opens?

The lip extends downward from the bumper, not upward into the trunk area. Clearance depends on your bumper's original height and how much the lip sits below it. Verify fitment with your vehicle's OEM bumper before final installation.

Should I use adhesive or drill through the bumper to secure it?

Factory mounting points are designed for fastener-based installation into existing holes. This method is more reliable for street use than adhesive alone, especially on rear bumpers that see road vibration. Use stainless fasteners to prevent corrosion.

How do I prep the FRP before painting?

Sand the entire surface to dull the gelcoat finish, then wipe clean to remove dust. Apply a quality primer suitable for FRP, then your topcoat. The raw FRP condition means the surface is sealed and ready for this process — no additional stripping needed.