Do I need fastening hardware to install these?

Hardware is not included with the panels. You'll need bolts and fasteners to secure them to your existing fender mounting points. Check your service manual or examine the OEM attachment points on your rear fenders to determine the correct size and quantity before ordering.

What prep work is needed before painting?

Sand the surface lightly to promote paint adhesion, then clean off all dust. From there, apply your primer and finish coat of choice. Because these arrive unpainted, you have full control over the final color match and clear coat type.

Will these panels work with my stock fender shape?

Over fenders are designed to layer on top of your existing rear panels and bolt at the factory mounting locations. Before ordering, verify that the bolt holes on your fenders align with standard OEM positions. If your vehicle has been previously modified, measure the fender width to confirm clearance with your wheel and tire setup.