Do these spats require special fasteners or mounting hardware?

These spats use your vehicle's existing rear bumper attachment points. Verify hole alignment with your bumper before final installation. Standard automotive fasteners work; refer to your service manual for torque specifications if you're using OEM hardware.

What prep work is needed before I paint or finish these?

Sand the surface with appropriate grit to promote paint adhesion, then clean thoroughly to remove dust. Apply your chosen primer and topcoat system directly to the prepared surface. No special sealing or undercoating is required unless you plan prolonged exposure to salt or moisture.

Are there any clearance concerns with rear suspension or exhaust components?

The spat extensions are designed to sit flush with the stock rear bumper profile. Confirm clearance with your exhaust system and any suspension modifications before tightening fasteners. If you've lowered your vehicle or added performance suspension, measure the gap between the bumper and spats while parked on level ground.