Very pleased and satisfied with the soft washing technique used by the company, Patriot Soft Wash. Everything was whitened and brightened with the special solution they use! ...and it's biodegradable. Thank you to the wonderful crew who did a spectacular job and I would highly recommend them to anyone needing their services. We had them for our street sidewalk, front door walkway, cast stone front windows, patio and pool coping. What a difference they made on our outside project!!! Great job!!!