Do I need clear coat on bare carbon fiber, or will it yellow in the sun?

Real carbon fiber will oxidize and darken under UV exposure without protection. A clear coat UV-protective finish is strongly recommended to preserve the weave pattern and prevent yellowing. Apply clear coat in thin, even layers following standard automotive paint practice.

How do I seal the edges to prevent water or debris from entering the weave?

Before any paint or clear coat, sand and prep all exposed edges smooth, then apply edge sealer or epoxy primer to the raw carbon surfaces. This locks out moisture and prevents delamination at the seams. Sand with 220-grit or finer, then wipe clean before sealing.

Will these fit with my existing side skirts and bumper, or do I need to modify anything?

Over fenders are designed to sit proud of the factory fender line; verify clearance with your existing body kit components before installation. Check fitment at the door jamb, rocker panel junction, and wheel well opening. Minor gaps between new fender and adjacent panels are normal and can be filled during paint prep if desired.