How do I get a punchy acrylic paint colour? I am diving in abstract painting but my acrylic colors are not alive.
My reds are sleeping, my blue and green vivacity are even worse. The only one that do it are my black and white. Mmm.
I know I should learn to make my own colors and master their punchiness (very saturated and opaque/thick), but I would prefer to have a consistent technique/material I could add, or better, a brand that creates live/punchy colors.
No matter what I do, my mixes are tern and really not interesting (just talking about colors themselves here, not the composition, which is another subject).
What can I do about this?
Henry is close, but the problem is that your acrylic is drying Matte. This is also, by the way, a problem with many different kinds of paint, whether they are spray paint, oil paint or acrylic. 

You can add glossy mediums to the paint, but I have found that painting a varnish (or firnis) on top generally yields more even results. I prefer sennelier gloss UV-protecting acrylic finish, which you can buy at pretty much any art supply store.

It really works!

The best thing to use is not any kind of spray, you want a thick, viscous medium. NEVER thin it with water, work from the center outwards and use a very soft wide brush. Don’t rework the gloss after you have spread it out, and be careful that your brush doesn’t lose any hairs.