I usually sell SW Duration as a one-coat product for one coat repaints. I sell SuperPaint or Resilience, also by SW, as my two coat option, though really, I try to sell clients what best fits their goals and budget. I do my best to explain the pro's and con's of the different approaches, give them prices and let them do the choosing. Sometimes I'll give four or so options: one-coat, two-coat, one-coat with two coats on the South surfaces... etc. But like you all have said, it just depends on the client and the job. Some folks don't want four options. They say, bid if for two coats of A-100, so I do.