Will this cover my factory fog light cutouts or will I need to cut new ones?

Check your existing bumper's fog hole location and size before final fitment. If your OEM cutouts align with this cover's openings, you're good. If they don't, you'll need to mark and carefully cut the fog holes to match your vehicle's setup.

Does this bumper have pre-cut sensor holes for parking sensors or other electronics?

This cover ships as a blank panel. Reference your vehicle's OEM bumper hole locations for any integrated sensors or electronics, then transfer those cutout positions to this cover before paint.

What prep work should I do before painting?

Sand and prep the surface to accept your chosen topcoat. Clean away any dust or residue after sanding, then apply your preferred primer and paint system according to the product manufacturer's instructions.