Does this trunk need clear coat protection after painting?

Yes. Once you apply your base color, a clear coat layer protects the finish from UV damage and keeps the carbon weave visible and vibrant long-term. Clear coat is standard practice for any exposed carbon fiber panel.

Will the carbon fiber yellow or fade in sunlight?

Carbon fiber itself resists yellowing, but unprotected resin can discolor over time. Applying clear coat immediately after base color seals the surface and prevents UV degradation. This is especially important for high-UV climates.

What prep work is needed before I paint this?

Sand the surface with appropriate grit to scuff the finish, then wipe clean of dust. This creates proper adhesion for your base coat and clear. Seal any exposed edges where the weave meets the outer surface to prevent moisture infiltration into the composite.