Do these bolt to factory holes or do I need to drill?

These mount at factory rocker points — no drilling needed. Test-fit before final fastening to confirm alignment with your vehicle's body.

Do the boards come with mounting hardware?

The mounting hardware is not confirmed in the product specs. Verify what fasteners you'll need against your RX's factory attachment points before installation.

Can I paint these or do they come finished?

These ship bare aluminum. If you want color-matched boards, plan to sand, prime, and paint them to your RX's finish before or after installation — whichever fits your workflow better.