Will this work with my existing front bumper cover?

Yes. This reinforcement bar installs behind your bumper and doesn't interfere with the outer cover. Your current bumper fascia stays in place.

Do I need to paint this before installing it?

It's hidden behind your bumper, so painting is optional. If you're concerned about surface protection, spray a coat of primer or satin black before bolting it down.

What hardware do I need to bolt this on?

You'll need fasteners to secure it at the factory mounting points—check your service manual or test-fit first to confirm the bolt size and count for your specific vehicle.