Will these side skirts interfere with jack point access?

No. The Vector line placement sits above the factory jack point locations. Before install, verify your vehicle's OEM jack point location and confirm clearance with the mounting bracket — standard setup leaves access unobstructed.

Do I need to paint these before installing?

They ship in raw FRP condition, so you can apply your chosen base coat and clear immediately. Some builders sand and spray primer first; others apply color coat directly. Either path works — just ensure the surface is clean and dry before paint.

What's the best way to prep the surface before paint?

Sand the FRP smooth and wipe down with a clean, lint-free cloth to remove all dust. The goal is a clean, even base for primer or paint adhesion. Your paint supplier can recommend grit and prep steps for your specific finish type.