Hemway Glitter Paint Additive Chunky 1/40" 0.6mm Emulsion Water Based Paints Wall Ceiling 100g / 3.5oz (Lavender)

Would you suggest painting the wall whatever color and then painting over with a clear paint with the sparkles in it?

What is the glitter made from?

I bought this and we did a trial and it is good, we can see the sparkles, but we bought mother of pearl color and it looks more greenish ..???

The video posted on this ad uses Chalk paint, but it says to use water based paint. What do I use?