Do I need to prep the surface before painting?

Yes. Sand the surface with fine-grit sandpaper and wipe clean to remove dust. Apply your chosen base coat and clear coat for best adhesion and finish.

What fasteners should I use to secure these to my fenders?

Use stainless steel or zinc-plated bolts rated for automotive exterior use. Refer to your vehicle's service manual or existing factory fastener specifications for proper gauge and torque values.

Will tire clearance be affected by these over-fenders?

Over-fenders sit outside the existing body line. Check that your tire and wheel setup does not exceed the extended fender width before installation. Test-fit or mock-up with your wheels mounted to confirm proper clearance.