It's amazing how well this stuff works. I started using it in the winter, when a hose & bucket wash is not practical (I'm in Michigan), but last spring I found ONR removes bugs much better than the car wash soap I was using in the foamgun. I'm using ONR year 'round now. Adds some shine with every wash too.
I use a grout sponge as my media FWIW.
I use a grout sponge as my media FWIW.