Does this need clear coat protection after I paint it?

Yes. After your base coat cures, apply clear coat to protect the carbon weave and prevent UV yellowing. Clear coat is essential for any exposed carbon fiber exposed to sunlight — it locks in the finish and maintains the visual depth of the weave long-term.

How do I seal the edges where the ducktail meets the panel?

Sand the mating edges smooth, apply a thin bead of flexible automotive sealant or epoxy where the ducktail connects to the main trunk surface, then primer and paint over it. This prevents moisture from seeping into the FRP and keeps water out of any gaps.

Will the carbon weave show yellowing over time?

Carbon fiber can yellow under prolonged UV exposure if left unprotected. Using a quality clear coat immediately after painting and refreshing it every 2–3 years keeps the weave looking fresh. Avoid prolonged exposure to direct sunlight when the car is stored.