I used to do wall murals for people along with decorating. I would apply non-yellowing glue with a brush exactly where I wanted it, then blow or flick, with a brush, the glitter on from a sheet of paper.

I think your trying to add glitter to paint and that just doesn't give it the same depth.

That idea is getting my wheels turning. I could place a stencil(s) up and blow or flick glitter into it. Thanks

There was someone who painted her laundry room with sparkling paint. It turned out beautiful! I’ll look to see if I can find her post

https://www.houzz.com/discussions/5884671/glam-lr-is-complete-and-it-exactly-what-i-envisioned

There is a post in review and also TV here on Houzz that describes how someone did that for her daughter (a singer) :
https://www.houzz.com/houzz-tv/a-rock-star-and-her-fiance-get-a-surprise-makeover-stshtvvw-vt~116580283

They paint a vanity niche and throw glitter on it while the paint was still wet.

The niche in that video looks amazing. How do you get rid of the glitter when you are done with the look?

I suppose you just paint over and new coat cover it?

I would think that the glitter adds some texture to the wall and you would have to do something to make the wall smooth again.

go to Lowes. they have actual sparkle additives for paint. I have used it. just ask the paint person and they'll show it to you.
this is more subtle. And will also be easier to paint over.

if you want it really glittery, then try this one

The chunkier it is, the harder it's going to be to cover it. So think about that for down the road.

I used one of those textured paints in my sons room years ago. I'll have to get it professionally scraped if I ever want it smooth again!

I painted my son's room many years ago to look like tree bark using two shades of taupe. We decorated it to look like a forest. I added texture to the walls with patching plaster and painted over it. I had to scrape and sand it to change it when he grew up and moved out. Now it will be glittery for my granddaughter. Thanks everyone for your ideas..

My DIL painted my granddaughter's room with glitter paint. She just did one wall. I believe it was Rust-oleum.

Used the valspar glitter. It’s expensive but if you want subtle glitter it can look stunning just a long tedious process to paint it on.

I would do removeable wallpaper and you certaily could not paint over that glitter. I find kids change their minds often as to what they LOVE next year so I would do something that is not going to be a PITA to remove.There are tons of fabulous glitter wall papers that is the way I would go. I think I redid our granddaughters’s room 5 times while she figured out her more grown up space and that is a far cry from the beginning.