I started looking at powerwash network about 2wks. ago and have become more knowledgeable than before on the pressure washing industry. I've posted a few questions here and there and have appreciated all responses. I have another question. I have a 2400 psi 2.5 gpm Karcher portable cold water unit. I've got a small portion of my wood fence that I want to practice on....eg. wood is turning dark. I want to know how and what I'm supposed to do to clean it and seal it? What sealer do I use and how do I do it? Spray it on? etc. If anybody wants to take the time to answer, I would greatly appreciate it. Thanks 