Hi Durwin,
Thanks, and good to hear from you. I currently have Mothers brand clay bar kit, but any brand should work well. They are basically just a clump of clay and some lubricant. These are the steps I follow:
1. Wash truck extremely well. I use a dish soap detergent for this step, as you want to remove as much dirt as possible and any old wax.
2. Rub clay bar all over painted surfaces as per directions. The trick here is to lubricate just enough to get the clay to slide across the paint, but still be tacky enough to grab and pick up any contaminates in the paint. If you use too much lubricant, the clay bar will just slide too easily across the paint and not pick up any stuff. If you use too little lubricant, you won't be able to slide the clay bar across the paint at all. So it is a balancing act. Do this step by hand, don't use a machine, so you can feel how the clay bar is sliding and grabbing the paint. You'll get a feel for it pretty quickly. Also, Don't drop the clay bar on the ground because it will pick up dirt, and you will be rubbing dirt onto your paint making scratches.
3. The paint should feel super smooth after step 2, but you will probably have some light clay smudges all over the paint. You need to re-wash the car again to remove these. Again, I use dish soap.
4. Now dry the car real good.
5. Apply your favorite wax and buff off.
This is all pretty labor intensive and takes a good deal of time. I usually spend one day just washing and clay barring. Then a second day to wax. It really makes a difference and I highly recommend it. I try to do it at least once per year.