Do these pieces come primed, or do I need to sand and prep before painting?

Surface comes primed and ready to paint. Sand lightly with fine-grit paper to ensure paint adhesion, then apply your primer and topcoat.

Will these deform or warp if the car sits in the sun before installation?

Polyurethane can soften in direct heat during shipping or storage. If pieces feel slightly soft or misshapen, place them in sunlight for a few hours — the material will naturally restore to its correct form as it cures.

Do I need professional installation, or can I handle this myself?

Professional install is recommended. Proper fitment, gap alignment, and fastener placement require experience with body panel work. Dry-fit each piece on the vehicle before committing to any fasteners or adhesive.