Does this come with clear coat, and will it yellow over time?

This arrives unfinished carbon — you'll need to apply your own clear coat before installation to protect against UV exposure and maintain the weave color. A quality automotive clear coat rated for carbon fiber prevents yellowing and keeps the finish looking fresh long-term.

How do I seal the edges to prevent fiber exposure?

Sand the edges smooth (220-grit minimum), then apply your chosen finish as you would the face. When you clear coat the top surface, wrap the coat around the edges to seal the weave. This prevents fraying and protects against moisture infiltration.

Will debris or road salt damage exposed carbon at the edges?

Carbon fiber is chemically stable, but unsealed edges can absorb moisture. Finishing the edges (same as above) is the best defense. Once sealed and clear coated, the lip resists salt spray and road grime just like any painted trim.