My method of using ONR is mixing in it in a 2 gal pump sprayer. Just two cap fulls of ONR and 2 gal of water in the sprayer. Pump it up and spray. This way the surface is thoroughly saturated and ONR can do its job of encapsulating the dirt. I then have another bucket of water with two microfiber towels to wipe off ONR then dry with a waffle weave towel. Do one section at time. Very effective and leaves little to no swirls marks. Haven't done it on a heavily soiled car though. I was using the two bucket method before but found that the 2 gal pump sprayer was more efficient and less wasteful. I can do two cars with a 2 gal sprayer as opposed to 1 car per 4 gal bucket before.
