they clip into the wheel. they are a PITA to get off from what i have heard, but it is possible. go to a wheel store and look at some that are on the floor. You will see how they are put on, its just a clip that expands once it goes thru the hole
Hmmm I'll have to go back to discount tire and see the easiest way to get them off and I know I have to sand down the star real good then paint any suggestions of types of paint to use that can come in a variety of colors?