Do these clamp onto existing bed rails, or do I need to drill?

These clamp directly onto factory bed rails — no drilling required. The clamping mechanism grips the rail from above, so installation is straightforward.

Will these fit if my bed rails are already damaged or dented?

Clamping relies on a solid rail underneath. If your rails are severely bent or kinked, test-fit first to make sure the caps seat evenly before committing to full installation.

Can I paint these, or do they come ready to use?

Installation and finish are up to you. If you want color-matched caps, you'll handle prep and paint separately — allow time for any surface work before mounting.