This is really a one-and-a-half part question.
I know that when paint is mixed with a solvent or used with a primer, it sometimes wrinkles. As I understand, a key physical phenomena here is a non-uniform evaporation of the primer or solvent that gives rise to different evaporation rates at the paint surface. This can create a non-uniform temperature difference. This in turn can create a thermocapillarity (surface tension effects due to non-uniform temperature distribution) or solutocapillarity (surface tension effects due to non-uniform solvent/solute concentration) effects that wrinkle the paint surface.
So is this a solvent problem or a primer problem? Am I understanding the physics right but the nature of primer and solvent wrong?