Oh I was joking, but it does seem thicker than what would be needed to spray.
There is a thing called a gloss meter that can see how much light reflects. I wonder if anyone has really tested these paints? I have a bunch of Dullcote and you can still get it, but it is like $9 bucks a tiny can. Many years ago I had eight 3 packs of Dullcote- all long gone now. I have bought a few full sized cans of products trying to find something just as flat as Dullcote and haven't been happy yet. Even bought the same can twice and after it was still glossy I put it on the shelf right next to the last can I tried. oops
It is like people just don't understand what dead flat is.
Army painters may know a few paints to try.
The rockwork on my scenery gets Dullcote as a last step. Everything I do to get the color just right ends with a shine that drives me nuts. Dullcote fixes that. I also Dullcote static grass (after I drybrush it) because it is very glossy and looks horrible straight from the bag.
And Dullcote must be lacquer (to lazy to look it up) because it dries insanely quick especially with an airbrush, still fast from a can.