ONR is optimum no rinse. It comes concentrated and can be mixed to wash or as a quick detailer. The stuff is awesome. I mix some in a small amount with soap in my soap gun and also in my wash bucket. On top of increasing lubricity to prevent swirls it softens the water to prevent spots from hard water. I use a natural sea sponge, two bucket method and a waffle weave mf to dry and get very little marring over the course of a year. I doubt any of the marring is from washing. Check out
http://www.autopia.org/ for more detailing information.