All hell broke and ghouls are coming in to your tuning shop to get their ling on and have their cars customized to their fancy. So give them the works and make their rides just like they have dremt. Drive the cars through the wash first and get them squicky clean by washing , shampooing, drying and giving them luster with your specialized equipment. After you finish the washing part and they are pristine you can take them to the tuning area and customize them to the ghouls heart. Add sculls , rotten eggs , lightning stickers and pumpkins to make Halloween a all year round celebration. There is nothing like driving a tricked out car that resembles yourself and the ghouls pay good money for this achievement. So get to it and offer them solutions to their hear.