I would ask for a credit, in writing.. Or that the service be credited and I can bring it back at the time of my choice for the tire rotation. Then if they give you attitute more than you have gotten just report them, don't even tell them you did it, just do it...
And you don't need to mark the tires I always bring in my PT when it is filthy, dirty rims tell a story... And since my dealership does a courtesy wash I put a sign on the dash "DO NOT WASH" and tip the guy who brings me a filthy PT a couple bucks, never had a problem....