Veren Pressure Cleaning

I am not sure how this happened, but at I was cleaning the deck with EFC, these streaks started appearing (see below). The wierd part is that only the pressure treated boards came out like this. All of the cedar was fine. Is this tannin bleeds or some rust off of the nails? I tried to use citralic to fix the problem, but it didn't seem to do anything at all to it. Any suggestions?

I was wondering which, of all the sealants, is the easiest to spray and with what machine (ie. deckster, airless, shurflo/delavan). I just finished a 2400 sq. ft deck with a raised portion, and did it entirely with brushes and rollers. It took far to long to finish and now I am finished with that method of application. I applied the TWP cedartone natural 100 series. I was told by several people, including the information center for the stain, that it was very unwise to spray TWP, so I did it the wiser and slower way. By the way, my name is Nick Wallace, 21, and currently accustoming to the normal American life again after a 2 year stay in Bulgaria as a missionary for my church. I am starting up a new company in the western region of Michigan, in a city called Grand Rapids. You all have given me priceless insights on starting the company and I thank everyone who has been generous enough to post a thread.

Thanks for the input. Sorry I haven't replied in a while. I was at a large family reunion near Makinaw City without an internet connection. Right now I have the Delevan PowerFLO 5800 5.3 gpm 60 psi. At the moment I only use it for chems. Bulgaria was great. I learned a LOT, but mainly the value of a functional family, a decent job and the luxuries many Americans have little appreciation for. It was a large factor why I started this company. I wanted to take advantage of the special opportunities I have as an American, such as working capitalism. The 2 year mission was the best decision of my life.

Thanks for the help. I have been to sunbrite a few times, but I bought a delevan pump and set up that system just days before I found out about the deckster. Now I am regreting not looking a little further, but for now it will do. BTW, Shane, if I were to use my delevan pump to spray with, how would I go about trying to get that wand set-up that you have. Secondly, how would I take care of the clean-up, trying to get the stain out of the pump and tubing, and is it possible to use the same unit to spray your chems. Thanks a ton.