Whoa...really?

Granted, many manufacturers no longer include brake system rebuild instruction in their authorized service manuals for liability reasons. And not all manufacturers made this mistake when they *did* include system rebuilding. But this "technique" is so dangerous it is unbelievable. In most mechanics schools doing this will get a student noticed in all the wrong ways. Do NOT remove brake caliper pistons using compressed air! There are special tools for doing this. Just another example of how the manufacturer, while they usually get things right and when they do, do it better than anyone, they don't always.