A moment of your time - please do not impose upon yourself to respond quickly as it is at least a month and a half before I am going to touch either of these cars. This is my yearly thread bothering you about new products after the time I've spent researching them since last December. Here is my plan, I am hoping as usual that you can lend me your thoughts on possible direction/alternatives for what I am trying to accomplish 1. M3 Clay SSR2.5 SSR1 Jeff's Werkstatt Prime Acrylic Jet Souveran topper Natty's Blue before car shows/shoots/meets I have been going for the slickest, "wettest" look for the M3 for the past few years and I am pretty set with both the SSR prep products and the finishing Souveran/Natty's carnauba combos. I had great results with the family's 05 TL going with the Natty's over Souveran, so I suspect I will be just as happy with this finishing combo on the M3: 2. Z4 Clay SSR2.5 SSR1 Jeff's Werkstatt Prime Acrylic Jet xxxx????? I am at a loss after this. From what I have read, the Werkstatt combo works very well with lighter colored cars but I guess I am lost with what carnauba topper to use. Is Souveran wasted on a white car? What about Natty's Blue? Just curious on your thoughts on this, as I will most likely try the combo anyway unless you are firmly opinioned that it would be a waste. Again, thank you for your time Scott, and please respond at your leisure - I will be researching this issue for a while.