I love my montana boars hair brush. It does smell like a wet dog alot, but it is great for large vehicles. I just let it foam soak in a bucket for about 30 minutes while I do wheels, then go to work. I use a quickie brand hardwood and metal threded broom handle to do my washes
I've found that mine leaves very light swirls, so I only use it before I'm correcting. They clean great - cleans the tight spots well. However, must admit, I did not soak it first. I will try that next time.