There is only one side of the house that has a fair amount of flaking, the exposed south side.
Does the TSP substitute also etch?
The sprayer I bought is 1550 psi. The wand has two settings, "high pressure fan" and "jet stream." I assume that "jet stream" is unwise. However, a previous post recommended no more than 800 psi. Should I return the sprayer? Is this too much risk for someone new to this type of project? I can't afford a more expensive sprayer, so I would need to scrub and scrape the house by hand (it's not a huge house, but still a good sized job for one person).