It's wrong, I know guys who have painted wrong for 40 years and "gotten away" with all kinds of crap.
Following the tech sheet is the best way to get something done properly. And for a newbe it is of the UPMOST importance because they don't have the experience to wing it.
You have seem the thread on sanding the base right Henry? Interesting test on sanding base coat paint (against the data sheets recommendation)
You can skip from about the third page all the way to the last couple as the middle is largely a peeing match.