It is really nice work and it will be good if you use pressure washer to clean a deck. Cleaners also come in different shapes and colors. Some may be detergent while other may be bleaches, while others may be chemical solution designed to react with some woods. It depends up to you that which type of cleaner you want to take but make sure that you have read all instruction of manufacture's instruction carefully. If you want to use a pressure washer then it's job is to remove the chemicals and dirt.