I have experimented with two bucket, rinseless, waterless, from cannons, and foam gun's.
I am not a fan of waterless for one specific reason. And that is there's not enough lubricity on the surface for you to drag the towel over it, and if you do put enough waterless you go through the product Fairly quickly.
A much better alternative is rinseless. It keeps a thin film of water between your microfiber and the surface so you don't scratch. Read my link below. Rinseless is the preferred method to also keep xpel in good shape by many installers. They usually recommend optimum ONR. I am a Duragloss rinseless fan, cheap and effective.
