You will need to do some legwork. Take your Pajero to Al Sinaiyah and visit several garages. Some of the streets have many of them adjacent to one another. They will see the work that needs to be done and will quote. Prices will vary from garage to garage. When a friend tried to get a full body paint done on his Nissan Tiida, costs varied from QR 1600 to QR 2600 among garages on the same road.