c100driver, surely some of the damage you describe was caused by negligence and would have to be borne by the PIC or club?!
I would not entertain putting my machine on line without an enforceable clause in the contract that the club would be liable for such damage that is not attributable to wear and tear. Why should I lose my no claims bonus with the insurance or have huge maintenance bills just because some d!ckhead doesn't take proper care? Surely no-one gets away with such behaviour when they rent a car, why would they when renting an aircraft?