I can get a hologrm free finish with a rotary, you just have to tke your time and do some slow passes towards the end with a softer pad. Ive tried correction with a DA and they just dont have the balls to do a quick job. Personally if you do go with a DA, then just aim to do a couple of panels at a time, with the lighter evenings, its easier just to do a panel at a time, and do it properly. plus that way you can take your time and try different polishes grades, id not go for the harshest compound 1st.