Will this interfere with the bumper beam or OEM trim?

No. This lip mounts to factory attachment points and sits flush with the bumper line. Verify your vehicle's OEM mounting hole locations before installation to confirm alignment with the lip mounting tabs.

Should I use adhesive or drill fasteners to secure this?

This design uses factory bolt points, so fasteners are the way to go. Bolting through existing holes ensures a rigid, permanent install. Apply a thread-locker compound to prevent vibration loosening over time.

What prep work do I need before painting?

Sand and prep the surface per your paint system requirements. Clean thoroughly to remove any release agent residue, then apply your chosen primer and topcoat. Follow the paint manufacturer's cure times before handling or wet washing.