Will this cover factory fog light cutouts, or do I need to drill them out?

Reference your vehicle's OEM bumper hole locations before assembly. The Sollera design may require you to match existing fog light openings to your current bumper configuration. Verify alignment with your factory lights during test fit.

Do lower valance pieces need separate hardware or mounting brackets?

This assembly is the bumper cover itself. For a complete install, verify that your existing hardware and mounting points on the vehicle will accommodate the new piece. Check your vehicle's service manual for fastener specifications and torque values.

What prep work should I do before painting?

Sand and prep the surface thoroughly before applying your chosen primer and paint. The bumper arrives in raw FRP condition, which means it has been prepared to accept base coats. Follow your paint supplier's surface preparation guidelines for best adhesion and finish.