Duplicolor, at least the last can I read the label of, looked and smelled, and had the ketones of acrylic lacquer.
Known to not be too durable.
It can also be other things, some paint notes a recoat or overcoat time window. Important.
Also, most primer needs to be sanded before color to provide a tooth for the paint to adhere to.
Some primer sealers do not require it, read the label.

The Eastwood product reads interesting. Personally, I like the control of a true spray g-u-n.
At that point the level of investment goes up.