Will this diffuser scrape on driveways or inclines?

The Midnight diffuser is designed to integrate with the factory rear bumper profile. Clearance depends on your current ride height and bumper condition. Before installation, measure your existing bumper's lowest point and compare it to your typical driveway angles. If you're already running lowered suspension, verify clearance with the bumper assembly in place.

Does this diffuser add functional downforce or is it cosmetic?

The Midnight diffuser is a styling enhancement. It complements the rear bumper line without generating measurable aerodynamic load. If you're building for track performance, consider this a visual upgrade rather than a performance component.

What prep work is required before painting?

Sand and prep the surface with standard automotive finishing techniques before applying your chosen topcoat. This ensures proper paint adhesion and finish quality. Follow your paint supplier's guidelines for primer type and surface preparation.