Thanks. Yes, it is normal for indoor car show. I don't think I have seen they remove the wheels outside. They would like show off for nice shiny rotor.

For whoever would like to go car show near your area if you have them on your local state.

There is link. My next plan is going to Indianapolis. It is 2 hours from here. Can't wait.
http://www.autorama.com/casi/schedule.html