Dolly casters in ustaad language should be trolley wheels.
You have worked on the dashboard in side the car. I was also concerned about the same. Why was it painted inside the car.
The car could have been sprayed inside/out in the booth before putting things back together.
Final installation could have been done before final rubbing polish.
Also delay, final rubbing polish until your car is fully functional and mechanically fit.
Because all kinds of people will put hands on your car might cause minor scratches. Also paint and clear coat bond if delayed would turn out much more prettier.