Originally posted by: exdeath
Originally posted by: Knavish
If you use a clay bar every time you wax, don't you end up wearing off the clear coat early? I was under the impression that a clay bar is a very mild abrasive that is meant to polish scratches out the clear coat.
You don't use the claybar on the clear coat. The clay rides on a layer of lubricant over the clear coat and grinds away little particles that stick out above the clear coat level.
Clay is only used for removing contaminants above the clear coat that don't come off with a wash mitt, things like tar, bug guts, sap, etc. Things you might otherwise be tempted to remove by picking with your finger nails or furiously scrubbing a small area while washing to get rid of pesky specs that wont gently wash away (and scratching the clear coat in the process).
You know when you are washing and you rub your bare hand over an area you still feel spots here and there and no matter how many times you run the wash mitt over it, it doesn't go away, and you know better than to scrape it off? That's exactly what clay is for. Clay bar progressively files those away without digging into the clear, if applied properly.
If you are doing anything with clear coat or scratches or swirls, you are using things like sand paper or a polisher that is intended to remove clear/paint.