I don't use a rotary so I can't really say if it would replace it. I am not a professional detailer and I don't work in a body shop. It will correct and finish very well. It will correct quicker than the GG will. Can one achieve the same level of correction with a standard DA (as compared to the rupes), probably but it would just take longer. Maybe someone who uses a rotary more often can provide some better insight.