Yep like Jeff said. Don't apply it on thick. Thin coats. It isn't like wax. You don't have to see it on there to know it is being applied. You can feel it.

In addition, my detailer suggested I apply it front to back on top of the car and top to bottom on the side of the car. Remove it in the same manner.

I have 3 layers of both z2 and z5 along w/ accelerator. Z6 I use after washes or polishing, which I hopefully don't have to do for another 6 months Thank god I won't have to claybar again!