Does this need clear coat, and will it yellow without protection?

Yes — clear coat is essential. Bare carbon fiber exposed to UV will yellow and degrade over time. A quality automotive clear coat protects the weave and maintains color. Sand the surface lightly and apply your chosen finish system for best results.

Should I seal the edge where carbon meets the body line?

Edge sealing is recommended to prevent water intrusion and protect the layered edges from moisture. After installation, apply a flexible sealant or edge-sealing compound along the perimeter where the trunk meets the body panel, especially at corners and seams.

What prep work is needed before finishing?

Sand the surface with appropriate grit to break the glossy factory finish and create adhesion for your chosen primer and paint or clear coat system. Wipe clean of dust and debris before any coating application. This ensures your finish adheres properly and delivers a factory-quality result.