First I power washed with a mild bleach/water mixture, to kill the mold and mildew. Then I applied Gemini Cedar and Redwood cleaner/brightner, let it dwell for about 10 minutes, then scrubbed gently with a soft bristled brush. Then power washed again, and waa-laa. I was really satisfied with the outcome. It is still kinda cool here in KC so I havent seen it completely dry yet. I'll post those pics before I apply my stain. Im using Penofin Western Red Cedar and will apply it on Monday, will show pics of that also.