Will this interfere with my bumper or undertray?

The Rayer lip mounts at factory attachment points on your lower fascia. Before final installation, dry-fit the piece and verify clearance with any aftermarket undertray or splitter. Minor trimming of existing bumper supports may be necessary depending on your setup.

What should I use to prep this for paint?

Sand the entire surface with medium-grit sandpaper to scuff the primer and remove any mold release residue. Clean thoroughly with soap and water, then wipe down with a prep solvent before applying your chosen primer and paint system.

How do I secure this to the bumper?

The lip uses the factory mounting holes on your OEM bumper cover. Verify your existing fastener locations before drilling, and use appropriate plastic-grade fasteners or adhesive-backed tabs rated for FRP. Reference your vehicle's service manual or OEM bumper diagram for correct hole positions.