ive never heard of the corn starch trick so i looked it up. From what i read the idea is that the swirls are caused by dead paint sticking to the pad marring the finish. By buffing with the corn starch it dissolves the old pant keeping the pad clean. It seems to me if you keep the pad clean that would solve the issue. If your using wool, blow it out with compressed air while spinning the pad. But more importantly, change the pad when it gets loaded up.
The fact still is the the swirls are from the aggressive compound and pad selection. It needs to be polished out.