Will this interfere with a trunk lid or hatch operation?

No. The Omega profile is designed to clear the trunk lid when fully open. The base mounts at the existing factory spoiler location, so fitment is plug-compatible with the original mounting points.

What mounting holes does this use?

This wing uses the factory rear wing mounting pattern. Before installation, verify that your vehicle's OEM spoiler base matches the hole locations on this assembly — the mounting points align with the standard configuration for this model year range.

Is the clear coat enough protection, or should I seal it further?

The factory clear coat protects the carbon fiber from UV and minor weathering. For maximum longevity, treat it like any carbon fiber component — avoid prolonged direct sunlight storage, and wipe down with a microfiber cloth periodically. A dedicated carbon fiber sealant can add an extra layer of protection if desired.