Uninflicted accident

Hello, I’m sorry, but I’ve got someone to hold his car door in my side today. Police co everything there.. no fault of my part according to the police etc.. Now I’m like me thinking about the whole deal.. The insurance of the opponent (accidentally the same as mine) naturally wants to go to their contract workshop. I’m just insecure about how far I might get problems later if I have rust or the like on the body and don’t get back to the Opel warranty anymore. if can?.. damage is not very small, exactly the passenger hit door handle, which then moved in the sheet metal. Have now also read more often necessarily lawyer? Puh…