In Reply to: what is claying ??? posted by dave on June 19, 2000 at 03:52:18:
Claying is a process of removing stains and such from the surface layer of the paint or clearcoat. The "clay" looks and feels like you'd expect clay to look and feel. The Meguirs product I used was a small brick about 1.5" x 2.5" x 0.25", light-gray in color.
The Meguirs package includes a prep spray which you first spray over the surface to be clayed. You then rub the clay over the surface, and the clay is supposed to pull fine particles out of the finish.
I wasn't sure what to expect when I used it. I was hoping to remove some smudges that wouldn't come out with a normal wash, and some fine water stains on the fender tops.
I started the process in a somewhat inconspicuous area and was a bit worried when the clay left dark smudges. I was able to remove the smudges by addition prep spraying and claying, but the results were not was I was hoping for. I ended up removing the stains with a light application of clearcoat prep/swirl-mark remover (followed-up with a wax).
I'll give the clay another shot, probably on the water marks. I now have a better idea of what to expect based on the excellent feedback I got here.
Other clay-bar product brands may be different in contents, description and application.
Hope this helps,