Does this come with clear coat protection, or do I need to apply it myself?

These arrive with a protective clear coat applied to seal the carbon fiber and preserve the weave finish. Inspect the surface before installation and touch up any handling marks with your chosen clear coat if needed.

Will the carbon fiber yellow or fade without UV protection?

The factory clear coat shields the carbon from UV exposure. Keep the surface clean and avoid prolonged direct sunlight storage when not on the vehicle. If you refinish the fenders later, use a UV-stable clear coat to maintain color.

Do I need to seal the edges where the fenders meet the door and body?

Sand and prep the mounting surfaces on your vehicle before installation. After bolting the fenders in place, seal any visible gaps along the edges with flexible trim sealant or color-matched caulk to prevent water intrusion and debris accumulation.