The idea with menzerna, or any other good polish/ compound/ levelers on the market, is to try and work the product till it becomes translucent on the paint. Once you start to get a lot of dusiting, you either need to clean the pad, or you are working the product a wee bit much. Ironically, it happens to me all the time, whether I use my d/a or rotary. but I have managed to continually reduce the dusting over time.
What I like to do is mix a lil bit of optimum with my menzerna to help reduce the dusting as well as allow me to work much longer in sunlight.