Is there any special handling for 3M's electrostatic diamond disks?

Not really.

You use the electrostatic diamond material the same way you would any other diamond material. Be sure to use a proper amount of water and go to work. 

If you're using the electrostatic diamond material as a belt, you should be aware that the material is thinner than a typical cloth backed belt and can more easily be ripped and damaged by sharp points.