Will this affect ground clearance or cause scrape issues?

The racer lip adds minimal extension to the front fascia line and does not lower the vehicle. Ground clearance remains unchanged. Verify that any downforce-style undertray or splitter you plan to pair with this lip clears driveway approaches and speed bumps in your area.

Is this rigid or does it flex during normal driving?

FRP panels are hard and rigid when properly mounted. They do not flex under normal street or track use. Ensure fasteners are tightened evenly to factory mounting points to maintain a flush fit and avoid panel movement.

What prep and paint process should I follow?

Sand the surface with appropriate grit and apply a quality surfacer or primer base coat before color. Finish with automotive paint and clear coat of your choice. Consult your paint supplier for specific product compatibility with FRP substrates.