CLAYING YOUR WHITE Q5
IMO so long as you pay attention to the clay itself to how dirty/contaminated itself gets and if it is filthy then move on to a new piece so those contaminants do not re-scratch your cars surface. That said you do not use the whole bar at one time ... take a section off to use. OHHH and it's VERY important to keep the car surface wet or slick so the clay doesn't 'dry drag' and do more harm than the contaminants already in your surface/paint.
You can as others have said use the clay on your windshield AND your rims too (I use my used pieces here).
One more thing we pre using Dawn dish soap and wash the cars completely 2x to remove any residual previous wax.
Oh that's right, I didn't. <img src=http://www.timelessgaming.com/timeless/forum/images/smilies/Kolo%20negative.gif>
Bringing Audi to Life for Audi Fans
A similar nod to surface preparation being the major element, much as it is when painting.
So, wash/clay/polish properly and then use a decent, but not ridiculously priced, wax and your finish will look good now and later.






