Does this bumper have fog light cutouts, or will I need to drill them?

This cover ships as a full fascia without factory fog cutouts. You'll need to reference your OEM bumper hole locations and carefully cut or drill to match your lighting setup before final installation.

Will this fit over my factory bumper reinforcement bar and sensor hardware?

The cover is designed to mount using factory attachment points. Check that any OEM parking sensors or collision avoidance hardware on your current bumper will clear the new fascia profile before committing to finish and install.

What's the best way to prep this for paint?

Sand the surface to clean away any release agent or dust, fill any imperfections with appropriate filler, and apply a quality primer before your final color coat. Your paint supplier can recommend the best primer system for FRP adhesion.