Is it a black Lexus? I've only worked on one lexus which had minor swirls. They easily came out using IP and an orange 5.5 inch pad. Depending on the condition of the paint, you might try a polishing pad (white) or a green pad with power finish. I've never used power finish but it should have about the same cut as IP or slightly less than SIP.
I know there are people on this site that have plenty of experience with the couple different black lexus colors. Hopefully, someone else will chime in?