Daniel, I'm completely sold on these paints for the ultra matt finish. BUT, you have to shake the shit out of them and for base coat, apply multiple thinned down layers... for example, for the zouave's red pantaloons I did 4 thin coats of the base colour to achieve a smooth flat base to work over. That was over white primer BTW.
Just like women... beauty is in the eye of the beholder.
Cheers my friend
Colin