We are doing work on a home we just bought which included redoing the front sidewalk, curb & gutter. Our new neighbors are saying that the contractor we hired got cement on there car. They brought this to my attention 27 days after my contractor completed the job. They got a quote to clean/detail/remove cement from car ($500.00). Am I responsible to pay for this or should I give the neighbors the contractor's info and let them handle it between themselves?