Do I need mounting brackets or hardware to install this?

Mounting hardware is not included with this crossbar. You'll need to verify what attachment points your vehicle has — most use factory roof rails or custom brackets. Check your vehicle's roof load points before ordering fasteners.

Can I paint or refinish this if the black doesn't match my car?

The aluminum is powder coated, so light sanding and spray paint will bond if you want a different color. Test on a small area first since powder coat prep varies. For professional results, media-blast and repaint through a body shop.

What weight can this crossbar handle?

Weight capacity depends on your vehicle's roof load rating and how the crossbar is mounted — not the bar itself. Check your owner's manual for maximum roof load, then subtract the crossbar's own weight to find your cargo limit.