One fun challenge with detailing a car is that there are lots of different surfaces you have to be mindful of. There are metal panels, glass windows, and plastic light pods, all with different properties that require a different cleaning approach. When it comes to detailing taillights, the procedure is surprisingly simple.
Larry Kosilla of Ammo NYC and Kevin Brown from Buff Daddy put together a quick video using a 2019 Acura NSX showing you how to remove scratches from your car's taillights and make them look like new. Unlike headlights, which take abuse from being at the front of the car, taillights typically don't get damaged much. That means the process to restore them to like-new shape is pretty simple. Any scratches you see usually aren't too deep, meaning and is all you need.
If you want to make sure the polishing is done evenly, Brown recommends a small polishing pad mounted to a hand-held drill. He says sanding is only necessary for buffing out deep scars, though it's unlikely you'll have to do that.