Will this bracket work with my front bumper as-is, or do I need to modify anything?

It mounts at factory rocker points with no drilling or bumper modification required. Your plate sits in the OEM position like the factory bracket.

What hardware do I need to bolt this on?

The bracket itself comes alone. You'll need bolts to attach it to your factory mounting points—refer to your service manual for the correct size and torque spec.

Does this need paint or prep before installation?

The bracket ships ready to install. If you want it finished to match your bumper, light sanding and paint prep before mounting will give you the cleanest look.