I washed my car a month ago and noticed a couple of fine scratches on the fender...... I got out the polishing compound and proceeded to give that area a bit of attention. Great... Scratches gone and the fender surface feels like glass! But the rest of the car still felt "gritty". After washing and wiping it down with a chamois, it just wasn't ready for a wax job. So..... I asked my boys for a clay bar kit for my birthday. A couple of days ago, I took the time for a thorough wash, chamois and hit it with the clay bar before I followed up with NXT Generation wax. I had never used a clay bar before and I was amazed at how easy it worked to make the entire car feel as smooth as glass. (I even did the windows with it because it cleaned the surface so well!) If you have a decent paint job on your car and are willing to take the time to clean it right... Get a clay bar kit and be prepared to be shocked at how great a job it does at final prep of the surface prior to waxing. I used the "Mothers" kit.