Do these covers require any fasteners or hardware I don't have?

Hardware is not specified with this set. Verify your door handle fasteners before ordering — you'll likely use your factory hardware, but test-fit first to confirm compatibility.

Will these covers fit over my existing door handles or replace them?

These are covers designed to mount at factory attachment points. They sit over or alongside the existing mechanism — they don't remove the original handle.

Can I paint or refinish these if I want a different color?

ABS can be painted with proper prep. Sand lightly, prime with plastic-compatible primer, then finish with urethane or enamel paint. Prep method depends on your preferred paint system — consult your paint supplier for specific grit and primer recommendations.