Will this interfere with my trunk lid when it opens?

No. The wing mounts to the roof panel above the trunk lid hinge line. Verify clearance by opening your trunk fully before final fastener tightening, as roof deflection during the first installation can be minimal.

What's the mounting hole pattern, and will I need to drill the roof?

This wing uses factory roof attachment points, so no new drilling is required. Before installation, confirm your vehicle's existing mounting hole locations match the wing's base pattern — measure the distance between the two factory anchor points on your roof.

How should I prep the FRP before painting?

Sand the primer surface with medium-grit sandpaper and wipe clean of dust. Follow your chosen paint manufacturer's prep recommendations for adhesion and cure time — FRP accepts standard automotive primers and topcoats without additional surface treatment.