Unless there is security footage showing the people while they are doing it and you are able to clearly identify the people from that footage it is going to be pointless for you to invest any time into locating the people. Most security cameras even high definition ones you will not be able to identify a person from them when they are used to monitor a parking lot. It would have to be a PTZ camera and they would have to be zoomed in on, this would mean that someone was watching while the deed was being done and that person did nothing when it happened!!!!..
If someone saw it you would have been told and the police would have been called. If you had the car parked < 50 feet from a security camera then check the videos. Even if the bastards are caught you still have a damaged vehicle and it's not like they are going to simply hand you the thousands to get the car repainted. So you are still going to have a damaged car in the end. You might get satisfaction from knowing they got into trouble for it, chances are they wouldn't do any jail time and would only end up on probation. It is almost not even worth the aggravation and time spent. I would defiantly let the place you work at know that it happened.
This is a gray area and would probably cause issues at your work place, but if you don't care about the job or have a want to change where you work.. If where you work has security cameras that monitor the parking areas they are responsible for your safety and also responsible for your property as well. You could get your employer or their insurance company to pay for the repair. It may cause tension in the work place tho. If it is a smallish/er company and you can actually speak with the owner, you should let him/her know directly, if you have worked there a long time and are a valued employee they might offer to take care of the repairs. It can and has happened before and would be worth a shot.
Well, it may not be "pointless" to find out who did it. "Proving" who did it by looking at footage and "knowing" who did it could be two different things. Proving it would be necessary for a court of law. Knowing would be necessary to make sure they didn't choose to do it again.