I do the wheel wells, wheels, and barrels on my own car using ONRWW, Wheel Woolies, and a few brushes. I do them last and pour the remaining dirty rinseless solution in the grass.
I use ONR as a pre-soak and ONRWW as the wash medium. I started using ONRWW a few months ago and I'm convinced it's magic also. It's very effective, convenient, and saves water.
The Tolco gray and golds can be had at US Plastics for a very nice price.
Gray w/ 32 oz. bottle - $1.87 each
Gold sprayer only for 16 - 32 oz. bottles - $1.72 each
Take a look at Optimum No Rinse Wash and Shine or Optimum No Rinse Wash and Wax; both are excellent products for rinseless washes. I prefer a microfiber sponge, like The Bone Wash...