hmm I thought this was an ask the pro's for the DIY er.....I am not afraid of work, in fact I love a challenge and to see a project through from start to finish. Esp to take something from old back to 'new' and shiny. Anyways I have read alot for the past 6 months. Perhaps I have misunderstood the pressure washing 'lingo' but I know that I will not be using 'high pressure' for this application. I have my tonic recipe which apparently has worked for many of you and just needed a steer in the right direction as far as how the best procedure is. NOT looking at stealing anyones trade secrets or anyones jobs......thanks anyways I will figure it out as there are people in this world who don't mind sharing and giving a bit of guidance in their fellow earth walkers!!