The FULL video on proper fence power washing. Doc walks you through the best methods, equipment and tips on pressure washing a fence. The product links are below or on linked pages.
Hose end cleaner bottle.
Here is a 4 PACK of GALLON jugs for pressure washer.
If any of these are out of stock click this search>>>>>30 Second Outdoor Cleaner
Pressure washer: Make sure you get the 4 year warranty. About $15
Pressure washing an old wooden fence.