Will this interfere with the trunk seal or latch?

The rear lip mounts low on the bumper area and does not contact the trunk assembly. Verify fitment against your specific bumper configuration before final installation, as aftermarket bumpers may have slightly different mounting points.

Can I adhesive-bond this or does it require drilling?

FRP panels like this one are most stable with mechanical fastening through factory or reinforced mounting holes. Adhesive alone may not hold at highway speeds or during aggressive driving. Drilling into the bumper is often the preferred method — use a backup board to prevent cracking during the process.

How do I prep FRP for paint?

Sand the entire surface with progressively finer grits to scuff the gelcoat, then clean thoroughly to remove all dust. Apply a quality primer designed for fiberglass before your topcoat. This raw FRP condition means the surface is already suitable for sanding — no additional stripping needed.