The hood liner should be removed to paint the underside of the hood. About the only places that don't remove it is a hack body shop like Maaco. It's not hard to remove. Just be sure to re-install it to keep the heat from possibly damaging the paint on both the underside of the hood and heating up to the point where it can cause damage to the outer surface of the hood.01 ZX3
What is the material on the underside of my hood? Can I remove it to paint the hood?