I have the same model and year. Happened to me when I tried to remove swirls with SwirlX using flex polisher, recieved the swirls at a nearby rotary car wash. Wasn't satisfied at all with the SwirlX results. I guess is the flex polisher, speed and pressure play major roll. Switched to Random Orbit Polisher and used Liquid Glass to polish after I washed off the SwirlX. Try w/RO Polisher and different product.
https://www.dropbox.com/s/v467v7hg51ulx0g/LexusES350.jpg