Don't you hate it when some smart a** posts a web site instead of just answering the question? The least he/she can do is check it and see if there is actually an answer to the question there, and give it.
Anyhow, washes won't give your Durango a shine. If you have swirl marks it's because someone who didn't know what they were doing used an abrasive cleaner or a non-automotive detergent, like dishwashing detergent. Dishwashing detergent is harsh, designed for use on glass and porcelain, not paint.
Clay bar cleaners are not intended to shine your car's finish. They are to remove oxidized paint which can dull the finish. After they are used the paint still needs to be polished and waxed.
You need a professional detailing. They will use a high-quality polish specifically designed to bring up the shine without removing the finish or leaving swirl marks.
You can do it yourself but you need the right equipment. A power drill with a buffer attachment won't do it. The speed needs to be regulated to avoid "burning" the finish or polishing through the clear coat.
The pros use Zymol products. They're expensive, but they work. You can get 16 oz of Z505 Concentrated Auto Wash for $8.99, and 16 oz of Liquid Cleaner Wax for $9.49 from the Auto Barn at amazon.com.