I have been painting my study for a few eons now - ever since Thanksgiving.  And I have come to the conclusion that the following things will contribute to a patchy first coat of paint and should be avoided at all costs:

  • The beginning of the room, when you do not yet have a feel for the technique
  • The end of the room, when you are fatigued
  • The middle-of-the-room of despair, when you have been painting forever and there is a still an endless expanse of unpainted room to go
  • Proximity to the ceiling
  • Proximity to the floor
  • Tiny spaces of limited brush movement
  • Large walls of excessive freedom
  • Too much light
  • Too little light
  • Wide, irregular strokes
  • Even, perfect strokes
  • Wet paint
  • Dry paint
That's why you should get one of these and just plan of a second coat from the start.