It depends on which type. The two piece clip (center looks like a pan head screw) is reusable. If the Nitro also uses the plastic rivets, they are not reusable. Also, you need a special rivet to replace them. I know the Jeep Commander used both types, but I am not sure if the Nitro does also. Hope this helps you.
Getting the damaged parts off can be a battle depending on the damage. This is tear down and beginning of installation not the new parts. The rest will be finished in the second video in just a few days. Thanks for checking it out