Interesting.ONR with a boars hair brush on a pole in my garage.
I never considered using a brush on the body with a rinseless wash.
I do use a Meguiar's body brush on my wheels with both rinseless and waterless washes.
While I know that several/lots of people use the BHBs, I never felt comfortable with the idea.
Of course, 5 or 6 years ago, I would not have considered using either a rinseless or waterless wash. Now they probably make up 95% of my washes.