I had three milks shakes through in my face and all over my car and baby by the manager of a local Arby’s the police where called and she was fired

Being the victim of an assault means that the criminal defendant may have to make restitution pursuant to KRS § 533.030, Conditions of probation and conditional discharge -- Restitution to victim.  While it is possible to bring a lawsuit where there is little economic damage, that would require hiring counsel on an hourly basis and is an expensive option.  If money is not a constraint and you are willing to pay an attorney to sue the individual and the company, any judgment would be reduced by restitution from the criminal defendant.  The cost of car detailing is a small fraction of the cost to hire an attorney, and would be included in the restitution order on the defendant in a criminal case, so that is the option chosen by most people.