There are several ways to make charges on an object evenly distributed. For example, if the surface of the object is infinite or the object is a sphere. There is one more way which I am not sure if it is a good way: if the object is made out of an insulating material.
I would like to know if there are other ways to make the charges on a finite charged plate evenly distributed over the surface? Also, how efficient is the idea of using an insulating material?