Protecting this carbon spoiler with PPF is a great call as it is very expensive and it is exposed to a lot of potential damage. The risks during install are alignment and more importantly avoiding cutting on the carbon at all costs with a knife. The precut piece has to fit perfectly from side to side and it also has to work round raised objects. Be sure to note how Martin changes his flow mid-install. This is a key learning moment as beginner and intermediate installers should see the importance of not forcing an approach.