If you only have minor swirls, I would not go with the IP. Lexus cc is one of the softest around, hence the easiest to correct. 106ff with a white pad should be more than enough. I never use anything stronger than Sonus SFX 2 or 106ff with a white pad on my Lexus and that always does the job. Only once did I have to use the orange pad with SFX 2 after a really bad experience with a natural sea sponge that marred the paint really bad. IP OR SIP WOULD BE OVERKILL ON A LEXUS, IMO. I know others here have used SIP and orange pad on a Lexus before, but I don't think there is a need to go to something that abrasive on this type of car unless that paint is absolutely trashed. If 106ff with a white pad does not do the job, it might be the technique, then you would need to slow down and apply more pressure.