You can cover the Excess charges with an insurance

For a low, annual premium, Insurance4carhire.com provides excess insurance protecting the customer against excess charges whenever they rent a car.

Your car rental includes Collision Damage Waiver (CDW) insurance. However you are still liable for excess charges on CDW. When a rental car is damaged or stolen, the driver is asked to pay a portion of the repair or replacement costs. This is known as the Excess.

Insurance4carhire covers you not only for the total amount of Excess for which you are liable if the car is damaged or stolen, but also for damage to the undercarriage of the car, windows and tyres.
www.Insurance4carhire.com