I don't know about the sun but isn't the Final Polish above the IP on the Menzerna chart? Like more cut than IP? Unless you mean final finish. That one goes after IP. In fact I just used those two tonight for the first time. They worked well together. The IP got rid of most of the swirling and fine scratches with an LC tangerine hydro pad, and then the FF with an LC white pad put a nicer shine on the IP.