Kevin has generously let us borrow his power paint sprayer.  Before spraying the primer, Pop had worked all the previous day to get the moulding, baseboards and casing ready.  I was very excited to be putting the first bit of paint on the walls.  I was looking forward to sealing up the wall and eliminating / reducing the amount of dust that was downstairs.  We taped up all the windows and hung some tape in the stairwell to block out any overspray.  
Spraying was fun.  Pop got to wear the Tyvek paint suit.  He also had a sock on his head that had an opening for his eyes.  

Pop’s glasses would get so sprayed that he had to clean the lenses about half a dozen times.  I just wrapped a couple of tshirts around my face and head.  At the end of the day, both of us had reverse racoon eyes.  We had stripes of white where we weren’t covered.
In a couple of places, we saw that there were some splatters coming from the paint sprayer, but since it was our first time using the sprayer, we figured it was normal.  During cleanup, we were very surprised to find that the filters in the paint sprayer were completely clogged.  Pop described them as like pumice stones.  One was so brittle, that it broke when it was removed.  
Once the primer was on, the next step was painting the ceiling and crown moulding.