Use of Clay Bars

[TM]

I disagree- you need to learn how to use it properly.

Yes, you mush wash and clean the car before using the clay.

After washing the car and drying it, you need to keep the clay very well-
lubricated while you're running it along the surface of the paint, turning
it often. I use quick-detailer spray for lubrication and it works fine-
it helped the finish on my hood quite a bit (black paint and VT winters is
not a good combo).

Clay requires care, but doesn't any waxing or polishing of the car require
the same degree of care? It takes me 4-5 hours to wash and wax my car
because
I take my time and do my best to do it very carefully.

I think you can find detailed instructions on carcareonline.com or possibly
on Griot's website.

Taka