If you are going to stay in this country for a long period means, go to Traffic department (Marroor)pay 20 riyals and ask for permission for tint film,even if your istimara due after some time no problem, once you pay the fee, you are allowed to have tint film on your car, then go to Titanium, they have 4 branches (Salwa road, Airport road, Garafa market, Al-Shafi)get film installed.

If you need discount send a PM, I will help you.