Take a lot of photos NOW. Next, run the truck through a car wash. Take a lot more photos. Now then tell them to go pound salt.

A small claims suit has a minimum dollar value - and they can't fudge the amount just to make the suit. In other words if they have $800 in damages but the small claims minimum is $1500, they can't jack the suit up just to meet the minimum. Also, it costs money up front to file a small claim, usually $300 minimum. And they lose that if they lose the suit. Low-lifes like this won't have the coin to pursue it legally.