nice idea about asking how much for a respray on the car,but that isnt really hitting him in the pocket really,as no doubt he will claim off of his insurers,
i heard of a contractor ripping off a gang of brickies and they went round his house and turned all his cars and vans upside down onto there roofs,within the day he was back behind a hire car,it will only cause him inconvenience for a short while,
personally talking to everyone you know at the builders yards you use and cafes about this a.rse hole will in the end pay dividends,you will shatter his reputation,which no doubt will hurt him in the pocket more.