Slightly Dusty Models

I recently primed some models and found that after they were dry, it felt like there was a fine dust. It's nothing visible, they're not grainy, and the coverage isn't spotty, other than the powdery feeling they're like any of my other models. I've heard of models becoming grainy after spraying but this is slightly different, it doesn't seem especially like a problem, I figured I'd just soak them in water and then let them dry to remove any powder, but I thought I'd check here in case there's a better course of action. Anyone else experience this? Thanks!