Will this cover existing fog light cutouts in my current bumper?

No. This is a full replacement cover without pre-cut fog openings. If your vehicle has fog lights, you'll need to reference your OEM bumper hole locations and mark corresponding positions on this cover before making any cuts.

Does this bumper have sensor or parking aid holes already cut?

No. This cover does not include pre-drilled sensor or parking aid cutouts. If your setup requires these openings, measure and mark the locations based on your vehicle's original bumper before drilling.

What surface prep is needed before painting?

Sand the surface with standard automotive grit to promote paint adhesion, then clean away all dust. Your chosen primer and paint system will bond properly to the prepared FRP base.