Will this work with my factory bumper sensors or fog light cutouts?

This lip sits below the fog light area and doesn't interfere with sensor placement. If your bumper has lower parking sensors, confirm clearance during test-fit before final installation.

Do I need to paint this before installing it?

No. It ships in matte black ready to bolt on. If you want a different finish or gloss, paint before installation to avoid overspray on your bumper.

What hardware do I need to mount it?

Mounting hardware isn't confirmed in the product specs. Test-fit the lip against your bumper first to determine whether you'll need fasteners, adhesive, or a combination—then source accordingly.