Does this cover the OEM sensor or parking aid holes in the bumper?

No. This is a lower valance panel and does not obstruct sensor cutouts. Verify your vehicle's OEM bumper hole locations before final installation to ensure the cover sits properly around any factory mounting or sensing points.

Will this require the lower bumper valance to be removed for installation?

Depends on your current setup. If you have an OEM lower valance, you may need to remove it to mount this cover cleanly. Check fitment with your existing bumper assembly before ordering if you plan to keep all factory pieces.

What finish should I apply before installing?

FRP panels are typically finished raw. Sand and prep the surface thoroughly, then apply your chosen paint, primer, or protective coating. Clear coat is recommended to protect against UV and weathering once your finish is complete.