Do I need clear coat on top of the paint, or will primer and color be enough?

Clear coat is strongly recommended. It protects the carbon weave from UV exposure and keeps the finish looking fresh longer. Sand the primer, apply your base color, then finish with a quality clear coat for durability and gloss.

Will the carbon fiber edges yellow or fade without protection?

Carbon fiber itself resists yellowing, but any exposed edges or areas without paint will benefit from edge sealing before you start finish work. Once the entire panel is painted and clear-coated, UV protection is built in.

How does this mount compared to the factory trunk—any special hardware needed?

This panel uses factory hinge and latch locations, so your existing hardware works. Verify that your OEM hinges and latch mechanism are in good condition before installation, and ensure all fastening points are clean and properly torqued.