Does this bumper have sensor or fog light openings pre-cut?

This bumper ships as a solid panel in raw FRP condition. Reference your OEM bumper cutout locations and trim or drill as needed to match your sensor and lighting setup. Use the factory bumper as a guide for hole positioning.

Will this fit over my existing rear bumper, or does it replace it entirely?

This is a replacement bumper cover. You will remove your factory rear bumper and install this panel using the same mounting points. Verify that your mounting hardware aligns with the factory attachment locations before assembly.

What prep work do I need to do before painting?

Sand and prep the primer surface with appropriate grit to accept your chosen paint system. A clean, properly scuffed surface ensures adhesion and finish quality. Follow your paint manufacturer's guidelines for primer compatibility and application.