What can be used to clean my aluminum dock decking?

Wet the dock surface and use a soft brush to clean.  Do not use a power washer as you may damage the paint.  If the dock has been submerged in water and has become stained you can use a mild detergent.  For severe stains you can use an aluminum alloy wheel cleaner or Ox Out 536 which is a stronger chemical cleaner.  Always ensure you use chemicals away from the shoreline to keep them from entering the lake.