Will this interfere with the factory bumper trim or side extensions?

No — the Wailen profile is engineered to blend with the OEM bumper housing. Before installation, mock-fit the lip to your specific bumper to verify clearance at the edges and ensure no clips or brackets are in conflict.

What prep work is needed before I paint this?

Sand the surface with appropriate grit to promote paint adhesion, then apply a primer or your finish coat directly. Ensure the surface is clean and dry before any finish application.

Can I drill through the mounting points, or should I use adhesive?

FRP is drill-friendly and tolerates fasteners well. A hybrid approach — selective drilling at stress points with supplemental adhesive at the edges — provides the most stable, vibration-free install at highway speeds.