Do these covers require adhesive or fasteners to install?

Installation method not specified in product data — test-fit on your cargo doors first to determine if adhesive, clips, or fasteners suit your setup. Some builders use trim-safe adhesive tape; others prefer mechanical fastening. Get hands-on before committing.

Will these covers work with aftermarket door handles or only factory ones?

These are designed for factory ProMaster rear cargo door handles. If your doors have been modified or fitted with aftermarket handles, verify fitment before ordering to avoid mismatch.

Do I need to paint or prep these before installing?

No. They come pre-finished and ready to bolt or adhere straight out of the box. ABS doesn't require primer or paint unless you want a custom color match.