I have posted before and lurked for a long time. I have a 2015 Audi Q7 being assembled in Germany now. Plan on taking delivery in a few months. Looking for some advice on prep and coating and figure this is a good time of year to purchase the products. I am going to go with Cquartz UK. Now, when I get the new car I will likely tell the dealer not to prep. I will clay the car and Iron X, or is that overkill? I have a GG 6" with the backing plate set up, do I need to polish? I have some Menzerna polish left, would that be compatible with the cquartz? Lastly, would I use eraser before i apply the coating? Is cquartz suitable for glass, or should I invest in a separate glass coating? Thankfully questions are typically free, product is not so I wanted the expert opinion before I purchase.