The wood looks rather bad from not staining it at least biannually. I have powerwashed many decks is various states ( 2400 PSI Karcher) and it does eat up the softer parts of the wood badly. I have not seen the bleach method work well.
I would try the idea of sanding the deck down and going from there; the powerwasher may be overly aggressive.
I would try the idea of sanding the deck down and going from there; the powerwasher may be overly aggressive.
