Does this need a clear coat?

Yes. A high-quality clear coat protects the carbon fiber from UV exposure and prevents the weave from fading or yellowing over time. Sand the panel lightly before application to ensure proper adhesion. Your chosen clear coat system should be UV-resistant.

Will the edges show exposed carbon if I leave it unsealed?

Exposed edges will absorb moisture and may delaminate if left unprotected. After installation, seal the perimeter edges with clear epoxy or your chosen protective finish to lock out water and maintain structural integrity.

How do I prepare the surface before painting or sealing?

Sand the entire panel with fine-grit sandpaper and wipe with a tack cloth to remove all dust. Ensure the surface is clean and dry before applying primer, paint, or clear coat. Proper prep is the difference between a finish that lasts and one that fails prematurely.