I'd like to add that you should be careful with the claybar. Personally, if you have new paint (new car), don't get anywhere near a claybar. Those things are good at catching particles on paint but they can also catch large particles of grit and then drag it across your paint, thus scratching it.
If you already have scratches, then you won't really notice. But if you have perfect brand new paint, don't even think of using a claybar.
I've talked to one person who who had perfect paint before the claybar and scratched paint after using one. Be careful.