Okay, question. We got a power washer and Ryan used it (I haven't messed with it yet) and it seems that the stream is so narrow that to do something that size would take AGES. Is there a trick to getting a wider stream or does it just take ages?
It depends on the power of your power washer. Mine is electric and about the size of a proton pack from Ghostbusters. To get those results I have to hold the washer about 6 inches from the wood and the stream hits it at about the size of a half dollar. The good news is that for about 80% of the deck I just have to paint over it once to get it clean, the rest is bad spots that take multiple passes. It takes me about 2-3 hours to do the area in the picture
Make sure and go back over it with a sealant, which should make it look nice in your weather (far less sun than Austin) for at least 3-5 years. And the water beading on the wood is pretty darned cool, too.