Will this bumper cover fit my existing fog light cutouts?

The D1 V3 design features a lower intake layout that may differ from your OEM bumper. Before purchase, reference your vehicle's current fog hole locations and compare them to the aggressive intake positioning on this cover. You may need to fabricate new openings or modify existing ones to match your lighting setup.

Do I need to modify my lower valance to fit this bumper?

This cover is designed for factory mounting points, but the extended D1 V3 profile sits lower than stock. Check your lower valance clearance and splitter compatibility before installation. Minor trimming of existing components may be necessary to prevent interference.

What's the best way to prep this for paint?

Sand the surface with progressively finer grits to create a smooth base, then clean thoroughly to remove all dust. Use your preferred epoxy or polyurethane primer and paint system for best adhesion and color match. A test panel on scrap FRP first is always smart before committing to your bumper.