Great work! Thanks for posting all of the details. I like to see what everyone else likes to use.
I clayed my AW '09 M3 as soon as I got it. It had quite a few contaminants bonded to the surface. Then I used a polish, sealant and tried some liquid souveran on it. It took me a good while with the clay but I took my time to try to keep micro marring minimal. I'll get out the PC and the Menzerna at a later date and go for full correction. I also clayed my wheels and tried some DP wheel glaze on them.