claybar wont take out scratches just particals. if you want to get scratches use mequiars scratch x. and if you do clay bar your car dont use the liquid. it sucks.
I use Optimum No Rinse Wash & Shine because i can do it year round, uses less water, is very easy to use and looks amazing. I learned about it from a professional detailer in TX and have used it ever since- http://www.optimumcarcare.com/norinse.html