Do these panels need clear coat?

Yes. Carbon fiber benefits from UV-protective clear coat applied before installation. This prevents oxidation and maintains the weave's color and gloss over time. Sand and prep the surface per your chosen clear coat manufacturer's guidelines before application.

Will the carbon fiber edges yellow or degrade without protection?

Carbon fiber exposed to direct sunlight without clear coat will gradually lose its dark finish and can appear hazy over time. A quality clear coat acts as a UV barrier and keeps the weave looking sharp. Seal all edges thoroughly during prep to lock in the factory finish.

What's the difference between these carbon panels and plastic rocker trim?

Carbon fiber is significantly lighter and offers a more defined, rigid structure than plastic. The hand-laid construction creates visible weave texture that plastic cannot replicate. Weight savings improve handling dynamics, and the material holds its shape under stress better than flexible OEM trim.