I used the new blue wheel cleaner on the paint of my 300c not diluted. It worked like a charm. Here is a before/during/after picture of the paint. This was only using the wheel cleaner, did not clay or polish before the picture
I had a similar situation in an old truck I bought. Mouse remnants, cigarette butts, and smoke smell. A good shampooing and some ON did the trip. A spray or two every few days goes a long way!