Using wax you go in a circular motion to apply and remove. With the clay bar it does not matter what pattern you apply the motion to the clay bar. Use lubercant panel by panel, clay, then use dmp chamie to clear. then move to next section.

The lubercant is the solution that allows the clay br to slide smoothly over your finish and allows the clay bar to remove those contminents you mentioned.

When I do the procedure on my Red XF I always start in the same way.

Wash & Dry

Clay:
Hood, roof, trunk, rear sides, doors, & front fenders.( 20 min. )

Do not make it harder then it needs to be, no rocket sceince...lol

Now follow up with your wax of choice.