Great article, Matthew, and thanks.
I use the clay bar and the Griot's pad. I always use lots of soapy water with either. Good to know about the clay towels. I'll have to give them a try. The effort with any of them is worth the result. And ceramic spray wax applied carefully will keep the surface slick for a long time. By carefully, I mean spray on a wet surface about a 3 x 3 ft. area and spread evenly with a fiber cloth or towel, rub it in a bit and immediately Pressure Wash it off, or it will streak. Clay and ceramic- the way to go.