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I train my painters to do a full first coat and a full second coat, regardless of color, product or sheen. That is what works best for us aesthetically and performance wise.
I like the first cut to establish the lines into the ceiling, so that the second coat ceiling cut can be held off from it by 1/16", and therefore it goes faster. I prefer the width of our cuts to not exceed much more than about two inches, because I don't like seeing brush texture on walls. Walls are to be rolled, and rolled tight into ceilings and trim. We finish trim in between first and second coat on walls (in new construction) and we get the most crisp finished lines by final cutting walls into ceilings and casings last, then cutting base into walls. We don't use very much tape as a result. We all prefer to brush over taping.
When guys do the big fat heavy cut, and then roll into it, there is that overlap of roller and brush which creates an effect called "Hat Banding". Its like having an extra coat where the two come together. It doesn't matter to some painters (or customers), but it matters to me. The texture issue is the fundamental pet peeve that has always kept me preferring the narrower width cut. The best brush guy on my crew describes it as the marriage between brush and roller on the wall.
It is a simple matter of work habits, and it seems that different painters and crews can have very different work habits. It does become muscle (and your eye is a muscle) memory after a while. Good habits stick. Bad habits are hard to break. Pick the good ones every time, even if it hurts your efficiency a bit while you develop them. Once developed, its automatic. This is how our painters are trained, and that is geared to the type of work we do, the service we deliver and our customer's expectations, all of which forms your reputation, which in turn is one of your most critical marketing and sales tools.
Ironically, it takes a little more time to spread less paint on critical cuts. It is easier to spread more paint fast than to spread less paint fast. It comes down to brush control. Our guys pretty quickly learn how to spread just the right amount of paint fast, which is in my opinion the ideal scenario because nothing ever looks sloppy from any angle, in natural or artificial light. That is one thing to keep in mind. If you are working in your customers home from 7-3:30, things will look completely different to them in artificial light at 10 pm. Cover all bases and avoid call backs.
This is the benefit of skipping no steps. Its a bigger picture mentality, but once you get it all working, its a good way.