Do these covers require any fasteners or adhesive to stay on?

No. These are designed as snap-on covers that fit over your factory handles. They hold in place through friction fit — no glue, bolts, or brackets needed.

Can I paint these before installation?

You can, but they don't require it. ABS takes paint if you want custom color match. If painting, light sanding and primer prep will help adhesion — follow your paint manufacturer's steps for plastic.

What if the covers don't fit snug on my handles?

Test-fit them first with the door open. If there's movement, you can apply a thin bead of flexible adhesive inside the cover before final installation. This is rare, but having an adhesive option on hand is smart.