Lol, what a horrible color combination on those walls.Due to the modern miracle of Al Gore rhythms, this showed up after viewing that Ace Hardware video. Looks easy enough...
Make your own easy mess free DIY Glitter paint - YouTube
Worst than Picasso's cubism art. Absolute kitsch.
From application point of view looks good.
Doesn't look like you need to 'eject' dry glitter on wet walls, or even spraying paint/glitter mixture.
Rolling that kitschy stuff looks easy enough and final finish looks good too.
I guess spraying should give better finish, assuming painter is skilled in spraying.