How Do I Use The Clay Bar?

[oldschl]

Can anyone give me advice on using the clay bar? I have a "gun metal grey color" on my '66 Nova that needs some TLC. I just purchased the car and I want to spend some time working with the paint to get it looking nice. The paint has some "bumps or bubbles" in the clear or the paint...I'm not sure. And it has some dull spots, which I think was bad paint prep. What can I use to get some nice results? What is this NXT product I've heard about? Anyway, I don't want to ask too many questions.

Help with understanding clay bar:
What wax/polish to use to get the dull spots revitalized:
Help with getting bubbles/bumps out of clear:
What is NXT:

[Ranger72]

The only way to get the "bubbles and bumps" out of the clear is to wetsand the clear. This has to be done by a trained professional to achieve an even hologram free finish. By holograms I mean buffer swirls.