The siding on my garage is just plywood covered with wood stain. The stain was wearing out so I'm restaining it. The bottom few inches of the wall in some places behind some bushes, has green moss on it. I scraped it off, but I think there is still some in the natural low crevices in the wood. I did wire brush it too. But I think I need to kill this moss before I restain. Should I just paint some bleach on the wall, let it sit awhile and hose it off, or is there a better way?