Just a couple of points on the above,

One person did reply saying that some companies will hire at a low rate then hit the customer with high repair cost for damage to the truck.

An other post un related to this was about damage to a hire truck. the person put before and after photos of a hire truck, before it left their premises it was like a fully reconditioned truck, it was placed on hire and when it was returned it was full of mud the ballast weight had big groves and scratches in the paint work, Now this company would have to re paint the ballast and clean the truck before it went back on hire so is it fair that they charge for this work.

As they did point out if a customer hired a car form say Hertz and returned it covered in mud with a big dent in the boot they would have to pay for the damage