Will this diffuser scrape on driveways or steep approach angles?

The diffuser extends from the rear bumper line and will make contact on severe inclines or very shallow angles. Measure your vehicle's current rear overhang clearance, then verify the diffuser geometry against your driveway pitch before installation. High-angle ramps and parking structures are typically safe; steep residential driveways may require cautious entry.

What prep work is required before painting or wrapping?

Sand the entire surface with appropriate grit to remove any release agent or mold residue, then wipe clean. Once prepped, apply your chosen finish—paint, clear coat, or adhesive wrap will adhere properly. If you plan to use clear coat for UV protection, apply it as your final layer over paint.

Is this a functional diffuser or cosmetic only?

This is a styling piece. It visually enhances the rear bumper profile and creates the appearance of aerodynamic flow. It does not generate downforce or serve as a functional air management component. Choose it for looks and design continuity, not for performance gains.