Will this interfere with the trunk seal or rear bumper fitment?

No. This is a front-mounted lip that sits below the lower air dam. It does not extend rearward or contact any trunk components. Clearance is maintained from factory suspension geometry.

Do I need to drill through the front bumper to install this?

No drilling required. This lip uses factory mounting points on the lower air dam and bumper structure. Fastening is done through existing holes; refer to your vehicle's service manual for torque specifications.

How should I prep and finish this before installing?

Sand the primer surface with medium-grit sandpaper, wipe clean, and apply your choice of automotive paint or clear coat. Proper surface prep ensures adhesion and long-term durability. Allow all finishes to cure per product instructions before mounting.