How To Pressure Wash Your Deck, Jackson NJ Here is a short video clip that shows a good demonstration of how to pressure wash your deck. This step is crucial to the deck restoration process. As with many other things, the prep before staining is more important than the staining itself. How long your stain will last, is completely dependant on the quality of the prep beforehand. So be certain you know how to pressure wash your deck, Jackson NJ, and you will enjoy your beatifully stained deck for many years to come.