Yes! After cleaning it, power sand all surfaces using a power disk sander to restore most of the deck boards to a 90% like-new condition. Hand sand spindles to prevent damage and remove any splinters that may have been raised by the pressure washer.
The used cards get turned over (do not shuffle). If picking one card at a time, you will have gone through all of the cards already, but if picking three...
I recommend sanding down the wood for a smooth finish. After, apply primer, sanding in between coats of primer in order to get a better adhesion to the paint.