Will this damage my factory bumper or grille?

The bull bar mounts to the frame, not the bumper, so your OEM grille and bumper stay intact. You'll need to remove the factory plastic lower valance for full clearance—most installs pull it off without tools.

Do I need special hardware to bolt this on?

The bar is designed for factory mounting points, so you'll use existing frame holes. Bring a wrench set and check your service manual for torque specs to make sure fasteners are tight before driving.

Can I paint this if I don't want chrome?

You can, but the chrome is sealed. Light scuffing with sandpaper will help paint adhesion—test on the underside first. Once prepped, use automotive-grade primer and topcoat rated for metal.