Clay bars are really good.Ive done my cossie,the wifes fiesta and my dads focus.They are really easy to use.I have a squirty bottle which i wet the panels with then rip a bit of the clay off and crunch till it looks a bit like a pan cake lol.Then just rub it on the panels.You will be amazed at the dirt they pull out of the paint.

I took a pic of the clay bar when i did my wifes car.I will post the pic up in a bit.