Do I need fasteners or mounting hardware to install these?

Mounting hardware is not included with this set. Before ordering fasteners, verify the existing bolt hole pattern on your vehicle's rocker line — this ensures you select the correct gauge and length for a secure fit.

What prep work is required before painting?

Sand the surface with appropriate grit to scuff the gelcoat, then clean off all dust. This creates good adhesion for your chosen topcoat — primer and paint application depends entirely on your finishing preference and local environmental conditions.

Will these vents allow water or debris into the cabin?

These are functional venting panels designed with drainage in mind. During installation, ensure the panels are seated flush and any drain holes align properly with existing body channels so water sheds away from interior components.